Physics Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, (5)

1. The equation applicable in the adiabatic process of n mole ideal gas is...
   
   
   
   1. ΔU = nC_pΔT
   2. ΔU = nC_vΔT
   3. ΔQ = nC_vΔT
   4. ΔQ = nC_pΔT
2. In a Carnot's engine, the working substance is...
   
   
   
   1. ideal gas
   2. steam
   3. petrol
   4. CO₂
3. Two particles A and b initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of centre of mass of the system is
   
   
   
   1. zero
   2. v
   3. 1.5v
   4. 3v
4. Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. The gravitational force of attraction between the planet and the star is proportional to R^(-5/2), then T² is proportional to...
   
   
   
   1. R³
   2. R^(7/2)
   3. R^(3/2)
   4. R^3.75
5. Electrical conductivity increases with the increase in temperature of...
   
   
   
   1. P-type semiconductor
   2. N-type semiconductor
   3. intrinsic semiconductor
   4. none
6. Amount of charge in coulomb required to deposit one gram equivalent of substance by electrolysis is...
   
   
   
   1. 96500
   2. 48 x 10^-10
   3. 6 x 10²⁴
   4. 9600
7. A camera lens is adjusted to f/4 and has an effective diameter of 2.0 cm. Its focal length is...
   
   
   
   1. 0.2 cm
   2. 1.6 cm
   3. 2.0 cm
   4. 8.0 cm
8. The self inductance of a long solenoid is directly affected by changes in all but...
   
   
   
   1. the number of turns
   2. the current
   3. the area of cross section
   4. the relative permeability of the core
9. Which of the following is not the unit of energy ?
   
   
   
   1. joule
   2. erg
   3. newton.metre
   4. dyne
10. All collisions conserve...
    
    
    
    1. kinetic energy
    2. momentum
    3. both kinetic energy and momentum
    4. neither of kinetic energy and momentum
11. If a rocket of initial mass m is to rise from its launching pad, its initial thrust must exceed...
    
    
    
    1. mg/2
    2. mg
    3. 2mg
    4. mg²/2
12. 9 gram of water contains approximately...
    
    
    
    1. 6 x 10²³ molecules of water
    2. 6 x 10²³ atoms of oxygen
    3. 6 x 10²³ atoms of hydrogen
    4. 3 x 10²³ atoms of hydrogen
13. A cable can support a maximum load of W without exceeding the elastic limit. If it is replaced by a cable of same material but half as long and half the diameter, the elastic limit will not be exceeded by the new cable up to a load of...
    
    
    
    1. W/4
    2. W/2
    3. W
    4. 2W
14. Surface tension does not depend on...
    
    
    
    1. surface area
    2. the type of liquid
    3. temperature
    4. medium in contact with the liquid
15. -40° F is equal to...
    
    
    
    1. -40° C
    2. -8° C
    3. -72° C
    4. -104° C
16. The magnitude of the field within a conductor...
    
    
    
    1. depends on the shape of the conductor
    2. is always zero
    3. is always positive
    4. may be zero or positive
17. A permanent magnet does not exert force on...
    
    
    
    1. an unmagnetized iron bar
    2. a magnetized iron bar
    3. a stationary electric charge
    4. a moving electric charge
18. A primary rainbow cannot be seen by an observer looking up if the altitude of the Sun exceeds...
    
    
    
    1. 10°
    2. 20°
    3. 22.5°
    4. 40°
19. According to the descending order of temperature the stars are classified in to the orders O,B,A,F,G,K and M. Our Sun comes in the order...
    
    
    
    1. A
    2. B
    3. G
    4. K
20. Position of the centre of mass of a rigid body depends on...
    
    
    
    1. its shape only
    2. distribution of its matter only
    3. both its shape and distribution of matter
    4. its position relative to the earth.
21. Force is to linear motion as _____ is to rotational motion.
    
    
    
    1. acceleration
    2. torque
    3. moment of inertia
    4. angular momentum
22. A hole is drilled to the centre of the earth and a stone is dropped in to it. When the stone is at the earth's centre, compared to the values at the earth's surface...
    
    
    
    1. its mass and weight both change
    2. its mass and weight both are zero
    3. its mass is unchanged and its weight is zero
    4. its mass is zero and its weight is unchanged
23. For an IC engine, the thermal efficiency depends on...
    
    
    
    1. the compression ratio
    2. the speed of the piston
    3. the temperature of working medium
    4. the diameter of the cylinder
24. A 12-V potential difference is applied across a series combination of four 6-ohm resistors. The current in each resistor is...
    
    
    
    1. 0.5 A
    2. 2 A
    3. 8 A
    4. 18 A
25. The temperature at which the thermo emf becomes zero is known as the...
    
    
    
    1. neutral temperature
    2. absolute temperature
    3. inverse temperature
    4. thermoelectric temperature
26. A transformer uses the principle of...
    
    
    
    1. self-induction
    2. mutual induction
    3. variable resistance
    4. electrostatic attraction
27. If V and V_m are the instantaneous and maximum values, respectively , of voltage in an a.c. circuit, then the mean value of the voltage is...
    
    
    
    1. V_m sinωt
    2. √ 2 V_m
    3. V_m/√ 2
    4. none of the above
28. Electromagnetic waves having wavelengths greater than 200 m are called...
    
    
    
    1. sky waves
    2. ground waves
    3. micro waves
    4. X-rays
29. If θ_m is the angle of diffracted wave with the direction of incidence and d is the width of slit, then m^th order minima is obtained for sinθ_m equal to...
    
    
    
    1. mλ/d
    2. dλ/m
    3. md/λ
    4. m/λd
30. As a sample of a radioactive element decays, its half-life...
    
    
    
    1. decreases
    2. increases
    3. remains the same
    4. changes exponentially.

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Physics Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, (4)

1. A current of 5 A passes along a wire of length 1.0 m. the wire is at right angles to a magnetic field of flux density of 0.15 T. The force acting on the wire is...
   
   
   
   1. 0
   2. 0.03 N
   3. 0.75 N
   4. 33 N
2. The end product of most radioactive decay series is usually some form of
   
   
   
   1. carbon
   2. helium
   3. hydrogen
   4. lead
3. The cause of surface tension is...
   
   
   
   1. adhesive forces
   2. cohesive forces
   3. external forces
   4. gravitational force
4. The unit 'poise' is...
   
   
   
   1. dyne.sec/cm²
   2. dyne.cm/sec²
   3. newton.sec/m²
   4. dyne.sec/cm
5. Emission line spectrum will be obtained from...
   
   
   
   1. candle flame
   2. sodium lamp
   3. Sun
   4. white hot filament of an electric bulb
6. A hollow insulated brass sphere is positively charged. The electric potential inside the sphere is...
   
   
   
   1. zero
   2. greater than the potential at the surface
   3. smaller than the potential at the surface
   4. the same as that on the surface
7. The linear momentum of a body is P = a + (bt²/2). The force acting on the body is...
   
   
   
   1. a + (bt/2)
   2. a + bt
   3. bt/2
   4. bt
8. The weight of a body on the surface of earth is 100 N. Its weight at a depth half way to the centre of earth will be...
   
   
   
   1. 50 N
   2. 100 N
   3. 25 N
   4. 125 N
9. Two wires C and D of the length in the ratio 2 : 3, diameter in the ratio 2 : 3 and of the same material, are subjected to same force. Then the ratio of their extentions l_c : l_d is...
   
   
   
   1. 3 : 2
   2. 2 : 3
   3. 4 : 9
   4. 8 : 27
10. The potential energy of a harmonic oscillator is maximum when the displacement is equal to...
    
    
    
    1. zero
    2. 1/2 amplitude
    3. amplitude
    4. 1/4 amplitude
11. When the forces acting on a body are in equilibrium, its...
    
    
    
    1. velocity is zero
    2. displacement is zero
    3. acceleration is zero
    4. momentum is zero
12. An object at rest may possess...
    
    
    
    1. velocity
    2. momentum
    3. kinetic energy
    4. potential energy
13. A nonconservative force does not give rise to...
    
    
    
    1. thermal energy
    2. kinetic energy
    3. light energy
    4. potential energy
14. Atoms forming a molecule attain the arrangement in which they obtain...
    
    
    
    1. zero potential energy
    2. minimum potential energy
    3. maximum potential energy
    4. none of the above
15. Bulk modulus of a liquid is...
    
    
    
    1. higher than that for a solid
    2. higher than that for a gas
    3. lower than that for a gas
    4. zero
16. The CGS unit of coefficient of viscosity is...
    
    
    
    1. dyne.second/cm²
    2. newton.second/cm²
    3. dyne.(second)²/cm²
    4. newton.second/cm
17. The volume of a gas sample is directly proportional to its...
    
    
    
    1. Fahrenheit temperature
    2. Celsius temperature
    3. Kelvin temperature
    4. pressure
18. The approximate relationship between the coefficient of linear expansion(α) and the coefficient of cubical expansion(γ) is...
    
    
    
    1. γ = α²
    2. γ = α³
    3. α = 3 γ
    4. γ = 3 α
19. When capacitors are in parallel...
    
    
    
    1. they are all at the same potential
    2. they are at different potentials
    3. their capacitances are equal
    4. the equivalent capacitance is zero
20. The earth's magnetic field at sea level is...
    
    
    
    1. 3 x 10^-9 T
    2. 3 x 10⁹ T
    3. 3 x 10^-5 T
    4. 3 x 10⁵ T
21. Monoatomic gases give...
    
    
    
    1. line spectra
    2. band spectra
    3. continuous spectra
    4. line and band spectra
22. The centre of mass of a rigid body...
    
    
    
    1. lies inside the body
    2. lies outside the body
    3. can be inside or outside of the body
    4. may not exist
23. If 'l' is the length of a simple pendulum and 'T' its period, then 'g' is given by...
    
    
    
    1. (4π²l)/T²
    2. 2π/(√ l/t)
    3. 2πl/t
    4. (4πl²)/t²
24. The rate at which an object radiates electromagnetic energy does not depend on its...
    
    
    
    1. surface area
    2. mass
    3. temperature
    4. ability to absorb radiation
25. Which of the following is neither a basic physical law nor derivable from one?
    
    
    
    1. Coulomb's law
    2. Ohm's law
    3. Kirchhoff's first law
    4. Kirchhoff's second law
26. The power dissipated as heat in an a.c. circuit depends on its...
    
    
    
    1. resistance
    2. inductive reactance
    3. capacitive reactance
    4. impedance
27. Impedance is a maximum at resonance in...
    
    
    
    1. a series RLC circuit
    2. a parallel RLC circuit
    3. all RLC circuits
    4. no RLC circuit
28. Red shift indicates...
    
    
    
    1. recession of star
    2. approaching movement of star
    3. that red light changes to violet
    4. that violet light changes to red
29. The penetration power of beta particles is 1. Then the relative penetration power of gamma rays is...
    
    
    
    1. 1
    2. 100
    3. 1/1000
    4. 1000
30. In a common-base circuit the current gain is...
    
    
    
    1. 0
    2. 1
    3. greater than 1
    4. smaller than 1

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Physics Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE,

1. For an object performing SHM the magnitude of maximum velocity is given by...
   
   
   
   1. ω √(A² - y²)
   2. ω √(y² - A²)
   3. ωA
   4. ω²A
2. The reciprocal of wavelength is called...
   
   
   
   1. frequency
   2. wave velocity
   3. amplitude
   4. wave number
3. ______ is for rotational motion as mass is for linear motion.
   
   
   
   1. mass
   2. torque
   3. moment of inertia
   4. inertia
4. If m is the mass of a planet, r is radius of its orbit, ω is the angular velocity and v is its linear velocity, then the force acting on planet is...
   
   
   
   1. mrv²
   2. mr²V²
   3. mrω²
   4. mr²ω²
5. In a fuel cell the conversion of chemical energy into electrical energy takes place...
   
   
   
   1. at both electrodes
   2. at the anode only
   3. at the cathode only
   4. in the electrolyte
6. Which of the following is not the unit of magnetic flux?
   
   
   
   1. weber
   2. tesla-m²
   3. m²kgs^-1
   4. henry
7. Impulse is equal to...
   
   
   
   1. momentum
   2. change in momentum
   3. change in momentum per unit time
   4. change in momentum per unit mass
8. 1 kWh is equal to...
   
   
   
   1. 746 W
   2. 3.6 x 10⁶ J
   3. 3.6 hp
   4. 746 kW
9. The atomic mass of copper is 64 and its density is 9.0 g/cm³. The volume of one mole of atoms of copper is _____ g/cm³.
   
   
   
   1. 6.023 x 10²³
   2. (6.023 x 9 x 10²³)/64
   3. (6.023 x 64 x 10²³)/9
   4. 64/9
10. Young's modulus for aluminium is 7 x 10¹⁰ Pa. The force needed to stretch, an aluminium wire with 2 mm diameter and 800 mm length, by 1 mm is...
    
    
    
    1. 2.75 N
    2. 275 N
    3. 1.10 N
    4. 275 kN
11. The MKS unit of coefficient of viscosity is...
    
    
    
    1. poise
    2. centipoise
    3. Pa second^-1
    4. Pa second
12. Electric charge is quantized. This means that the electric charge...
    
    
    
    1. is not continuous
    2. is continuous
    3. is constant
    4. has mass
13. A 2 kg ball moves with a speed of 8 m/s and collides with a 4 kg ball moving in the same direction with a speed of 2 m/s. After the collision, the heavier ball has a speed of 5 m/s. The collision results in a decrease in the total kinetic energy of translation of two balls of...
    
    
    
    1. 0 J
    2. 6 J
    3. 12 J
    4. 18 j
14. The result of combining two mutually perpendicular vibrations was first extensively studied by...
    
    
    
    1. Huygens
    2. Lissajon
    3. Sabine
    4. Newton
15. On a sunny day you may see very bright lines formed on the bottom of a swimming pool. The prime cause of these is...
    
    
    
    1. absorption
    2. diffraction
    3. interference
    4. refraction
16. A piece of glass which has been heated to a high temperature is left to cool. If the glass cracks, it will most likely be because of...
    
    
    
    1. low thermal conductivity of glass
    2. high thermal conductivity of glass
    3. low specific heat capacity of glass
    4. high specific heat capacity of glass
17. The charge to mass ratio of an electron is about 1.8 x 10¹¹ C kg^-1. In a certain television tube, where the accelerating voltage is 1600V, the electrons have a speed just before striking the screen of approximately...
    
    
    
    1. 16000 kms^-1
    2. 20000 kms^-1
    3. 24000 kms^-1
    4. 28000 kms^-1
18. A mass spectrometer may be used to distinguish between...
    
    
    
    1. different elements
    2. different isotopes
    3. identical isotopes bearing different charge
    4. all of the above
19. If a train is to move with velocity of light, its length would be
    
    
    
    1. infinite
    2. unchanged
    3. zero
    4. half the original
20. A radio-station broadcasts at 30 m band. The frequency of electromagnetic waves transmitted from this station could be...
    
    
    
    1. 10 MHz
    2. 10 kHz
    3. 3 x 10¹⁰ Hz
    4. 11 x 10¹¹ Hz
21. The energy generation in stars is due to...
    
    
    
    1. fusion of heavy nuclei
    2. fusion of light nuclei
    3. chemical reaction
    4. fission of heavy nuclei
22. Two resistances are joined in parallel whose resultant is 6/5 ohm. One of the resistance wires is broken and the effective resistance becomes 2 ohm. The resistance in ohm of the wire that got broken is...
    
    
    
    1. 2
    2. 3
    3. 3/5
    4. 6/5
23. When the distance between a source and a cliff is 'd', the time taken to hear the first echo of sound with velocity 'V' is...
    
    
    
    1. V.d
    2. 2V/d
    3. 2d/V
    4. d/V
24. Which of the following pairs of physical quantities have the same unit?
    
    
    
    1. Force and power
    2. Stress and strain
    3. Young's modulus and pressure
    4. Coefficient of viscosity and surface tension
25. The area enclosed by the displacement-time graph of a body thrown in air gives...
    
    
    
    1. average speed
    2. average velocity
    3. acceleration
    4. no significant physical quantity
26. A particle is moving eastwards with a velocity of 5 m/s. In 10 seconds the velocity changes to 5 m/s northwards. The average acceleration in this time is...
    
    
    
    1. zero
    2. (1/√ 2) m/s² towards northwest
    3. (1/√ 2) m/s² towards northeast
    4. (1/2) m/s² towards northwest
27. Swimming becomes possible because of _____ law of motion.
    
    
    
    1. First
    2. Second
    3. Third
    4. none of the three
28. A thin film of liquid is enclosed between two glass plates. It is difficult to separate the plates on account of...
    
    
    
    1. Viscosity
    2. Surface tension
    3. Friction
    4. Atmospheric pressure
29. The highest temperature that can be recorded by a mercury thermometer is...
    
    
    
    1. 100°C
    2. 157°C
    3. 257°C
    4. 357°C
30. A tuning fork originally in unison with another fork of frequency 260 Hz, produces 4 beats per second, when a little wax is attached to it. What is the frequency now?
    
    
    
    1. 260 Hz
    2. 264 Hz
    3. 256 Hz
    4. 262 Hz

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