MCQOPTIONS
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MCQOPTIONS
This section includes 92 Mcqs, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In simple harmonic motion, the particle velocity lags behind the displacement by a phase angle of __________. |
| A. | π/2 |
| B. | -π/4 |
| C. | π |
| D. | -π |
| Answer» B. -π/4 | |
| 52. |
A spring can be used to determine the mass m of an object in two ways: (i) by measuring the extension in the spring due to the object; and (ii) by measuring the oscillation period for the given mass.Which of the methods can be used in a space station orbiting Earth? |
| A. | Both |
| B. | Only the extension method |
| C. | Only the oscillation method |
| D. | Neither |
| Answer» D. Neither | |
| 53. |
A spring when compressed by 4 cm has 2 J energy stored in it. The force required to extend it by 8 cm will be |
| A. | 2 N |
| B. | 20 N |
| C. | 2000 N |
| D. | 200 N |
| Answer» E. | |
| 54. |
If T is the time period of an oscillating pendulum, which one of the following statements is NOT correct? |
| A. | The motion repeats after time T only once |
| B. | T is the least time after which motion repeats itself |
| C. | The motion repeats itself after nT, where n is a positive integer |
| D. | T remains the same only for small angular displacements |
| Answer» B. T is the least time after which motion repeats itself | |
| 55. |
In the simple harmonic motion "x = 1/4 - A cos(2ωt)", the point of equilibrium is ______________. |
| A. | 1/4 |
| B. | A |
| C. | -A |
| D. | 2ωt |
| Answer» B. A | |
| 56. |
A pendulum is executing simple harmonic motion and its maximum kinetic energy is K1. If the length of the pendulum is doubled and it performs simple harmonic motion with the same amplitude as in the first case, its maximum kinetic energy is K2. Then |
| A. | K2 = 2K1 |
| B. | \({K_2} = \frac{{{K_1}}}{2}\) |
| C. | \({K_2} = \frac{{{K_1}}}{4}\) |
| D. | K2 = K1 |
| Answer» B. \({K_2} = \frac{{{K_1}}}{2}\) | |
| 57. |
A particle is executing simple harmonic motion (SHM) of amplitude A, along the x-axis, about x = 0. When its potential energy (PE) equals kinetic energy (KE), the position of the particle will be: |
| A. | \(\frac{{\rm{A}}}{2}\) |
| B. | \(\frac{{\rm{A}}}{{2\sqrt 2 }}\) |
| C. | \(\frac{{\rm{A}}}{{\sqrt 2 }}\) |
| D. | A |
| Answer» D. A | |
| 58. |
A massless spring (K = 800 N/m), attached with a mass (500 g) is completely immersed in 1 kg of water. The spring is stretched by 2 cm and released so that it starts vibrating. What would be the order of magnitude of the change in the temperature of water when the vibrations stop completely? (Assume that the water container and spring receive negligible heat and specific heat of mass = 400 J/kg K, specific heat of water = 4184 J/kg K) |
| A. | 10-4 K |
| B. | 10-5 K |
| C. | 10-1 K |
| D. | 10-3 K |
| Answer» C. 10-1 K | |
| 59. |
If the capacitors are connected in parallel, then the potential difference across each capacitor is |
| A. | different |
| B. | same |
| C. | infinite |
| D. | zero |
| Answer» C. infinite | |
| 60. |
In a perfectly elastic collision, the momentum and energy are |
| A. | conserved |
| B. | not conserved |
| C. | equal before collision |
| D. | becomes zero after collision |
| Answer» B. not conserved | |
| 61. |
If a billion electrons enter a point in 1 s then number of electrons leaving that point in 1 s are |
| A. | 3 billion |
| B. | 2 billion |
| C. | 10 billion |
| D. | 1 billion |
| Answer» E. | |
| 62. |
The new nucleus after alpha particle decay is called |
| A. | daughter nucleus |
| B. | parent nucleus |
| C. | undecayed nucleus |
| D. | decayed nucleus |
| Answer» B. parent nucleus | |
| 63. |
The activity of one decay per second is equal to |
| A. | 1 atm |
| B. | 1 Bq |
| C. | 1 Cd |
| D. | 1 mol |
| Answer» C. 1 Cd | |
| 64. |
The extra distance travelled by one of the waves compared with the other is called |
| A. | displacement |
| B. | path |
| C. | path difference |
| D. | phase difference |
| Answer» D. phase difference | |
| 65. |
If an object moves back and forth repeatedly around a mean position it is called |
| A. | revolving |
| B. | oscillating |
| C. | motion |
| D. | rotating |
| Answer» C. motion | |
| 66. |
In order to slip one surface over another, maximum frictional force has to be overcome, this maximum frictional force between the two surfaces is also known as: |
| A. | maximal frictional force |
| B. | kinetic frictional force |
| C. | None of the above |
| D. | limiting frictional force |
| Answer» E. | |
| 67. |
The grating element is equal to |
| A. | nλ |
| B. | nλ⁄sin θ |
| C. | cosθ |
| D. | sinθ |
| Answer» C. cosθ | |
| 68. |
The period of simple harmonic motion of a spiral spring or elastic thread is given by: |
| A. | T = 2? × ( extension_produced ⁄ ?gravitational_field_strength ) |
| B. | T = 2? × ( extension_produced ⁄ gravitational_field_strength ) |
| C. | T = 2? × ?( extension_produced ⁄ gravitational_field_strength ) |
| D. | T = 2? × (?( extension_produced) ⁄ gravitational_field_strength ) |
| Answer» D. T = 2? × (?( extension_produced) ⁄ gravitational_field_strength ) | |
| 69. |
The internal resistance of cell when there is current of 0.40 A when a battery of 6.0 V is connected to a resistor of 13.5 Ω is |
| A. | 2.3 Ω |
| B. | 1.5 Ω |
| C. | 4.5 Ω |
| D. | 3.5 Ω |
| Answer» C. 4.5 Ω | |
| 70. |
If the initial velocity of an object is zero, then distance covered by it in time t and acceleration of 9.8ms-2 would be |
| A. | 3 t2 |
| B. | 2.9 t2 |
| C. | 4.9 t2 |
| D. | 4 t2 |
| Answer» D. 4 t2 | |
| 71. |
The resistance of a particular wire depends upon |
| A. | shape and length only |
| B. | size and shape |
| C. | shape only |
| D. | size only |
| Answer» C. shape only | |
| 72. |
The gradient of velocity-time graph gives |
| A. | frequency |
| B. | force |
| C. | acceleration |
| D. | wavelength |
| Answer» D. wavelength | |
| 73. |
Lepton among them are |
| A. | neutrinos |
| B. | electrons |
| C. | both A and B |
| D. | protons |
| Answer» D. protons | |
| 74. |
The acoustic impedance of human skin is |
| A. | 1.71x106kgm-2s-1 |
| B. | 1.65x106 kgm2s-1 |
| C. | 2x107kgm-3s-2 |
| D. | 2x106kgm-2s-1 |
| Answer» B. 1.65x106 kgm2s-1 | |
| 75. |
In s.h.m the object's acceleration depends upon |
| A. | magnitude of restoring force |
| B. | displacement from equilibrium position |
| C. | force exerted on it |
| D. | both A and B |
| Answer» E. | |
| 76. |
If the swing moves from right to left then velocity is |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | constant |
| Answer» C. zero | |
| 77. |
The natural frequency of a guitar string can be changed by changing it's |
| A. | diameter |
| B. | area |
| C. | stiffness |
| D. | length |
| Answer» E. | |
| 78. |
A force that acts to return the mass to it's equilibrium position is called |
| A. | restoring force |
| B. | frictional force |
| C. | contact force |
| D. | normal force |
| Answer» B. frictional force | |
| 79. |
The derived unit Tesla is related to |
| A. | kg |
| B. | A |
| C. | all of above |
| D. | s |
| Answer» D. s | |
| 80. |
In semiconductors upon increasing temperature the conductivity |
| A. | increases |
| B. | decreases |
| C. | haphazard |
| D. | remains constant |
| Answer» B. decreases | |
| 81. |
If a current of 1A passes through a point in 1s then charge passes that point is |
| A. | 3 C |
| B. | 2 C |
| C. | 6 C |
| D. | 1 C |
| Answer» E. | |
| 82. |
Larmor frequency depends upon the |
| A. | magnetic flux density |
| B. | individual nucleus |
| C. | energetic flux unit |
| D. | both A and B |
| Answer» E. | |
| 83. |
The amount of d.c voltage as compare to Vo is |
| A. | 0.6 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 0.7 |
| Answer» E. | |
| 84. |
Torricelli's theorem states that the velocity 'v' of the liquid emerging from the bottom of the wide tank is given by ?(2gh). In practice, this velocity is: |
| A. | greater than ?(2gh) |
| B. | equal to ?(2gh) |
| C. | independent of height and gravitational field strength |
| D. | lesser than ?(2gh) |
| Answer» E. | |
| 85. |
A rectifier converts |
| A. | AC to DC |
| B. | DC to AC |
| C. | current in to voltage |
| D. | voltage in to current |
| Answer» B. DC to AC | |
| 86. |
When light enters from vacuum in to glass, it's velocity |
| A. | remains same |
| B. | decreases |
| C. | varies depending on mass of glass |
| D. | increases |
| Answer» C. varies depending on mass of glass | |
| 87. |
Energy is lost in wires due to |
| A. | resistance |
| B. | heating |
| C. | none of above |
| D. | both A and B |
| Answer» E. | |
| 88. |
The work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is |
| A. | 1300 KJ |
| B. | 1000 KJ |
| C. | 1200 KJ |
| D. | 1400 KJ |
| Answer» D. 1400 KJ | |
| 89. |
Magnetic field can be produced by using |
| A. | electric current |
| B. | permanent magnet |
| C. | both A and B |
| D. | temporary magnet |
| Answer» D. temporary magnet | |
| 90. |
The threshold voltage at which LED emits light is |
| A. | equal to 0.6 |
| B. | less than 0.6 |
| C. | more than 3 |
| D. | more than 0.6 |
| Answer» E. | |
| 91. |
For a resonating system it should oscillate |
| A. | only for some time |
| B. | bound |
| C. | for infinite time |
| D. | freely |
| Answer» E. | |
| 92. |
Substances that elongate considerably and undergo plastic deformation before they break are known as: |
| A. | breakable substances |
| B. | brittle substances |
| C. | None of the above |
| D. | ductile substances |
| Answer» E. | |