101. The motion of a freely falling body is an example of
(A) Uniform motion
(B) Non-uniform motion
(C) Uniformly accelerated motion
(D) Circular motion
102. The dimensional formula of energy is
(A) ML²T⁻²
(B) MLT⁻²
(C) ML²T
(D) MLT²
103. Which of the following is an example of a non-conservative force?
(A) Gravitational force
(B) Electrostatic force
(C) Frictional force
(D) Magnetic force
104. The work done in moving a charge in an electric field depends on
(A) The path taken
(B) The speed of the charge
(C) The initial and final positions
(D) The mass of the charge
105. The kinetic energy of a body becomes four times when
(A) Its mass is doubled
(B) Its velocity is halved
(C) Its velocity is doubled
(D) Its mass is halved
106. Escape velocity on Earth is approximately
(A) 7.9 m/s
(B) 11.2 m/s
(C) 7.9 km/s
(D) 11.2 km/s
107. The time period of a simple pendulum depends on
(A) Mass of the bob
(B) Length of the pendulum
(C) Acceleration due to gravity
(D) Both (B) and (C)
108. If the displacement of a particle is zero, then the work done is
(A) Negative
(B) Infinite
(C) Positive
(D) Zero
109. The heat required to raise the temperature of 1 kg of a substance by 1°C is called
(A) Latent heat
(B) Specific latent heat
(C) Specific heat capacity
(D) Heat capacity
110. A Carnot engine operates between 500 K and 300 K. The efficiency of the engine is
(A) 0.4
(B) 0.4 or 40%
(C) 0.6
(D) 60%
111. The relation between frequency (f), wavelength (λ), and speed (v) of a wave is given by
(A) v = λ/f
(B) v = fλ
(C) λ = vf
(D) f = v/λ
112. What is the nature of the graph between pressure and volume for an isothermal process?
(A) Straight line
(B) Hyperbolic curve
(C) Parabolic curve
(D) Circular curve
113. Which type of bond is responsible for the high boiling point of water?
(A) Covalent bond
(B) Ionic bond
(C) Hydrogen bond
(D) Van der Waals force
114. When a liquid flows through a pipe, its flow is said to be turbulent if
(A) Reynolds number is less than 2000
(B) Reynolds number is greater than 4000
(C) Reynolds number is between 2000 and 4000
(D) Reynolds number is greater than 4000
115. The surface tension of a liquid
(A) Increases with temperature
(B) Decreases with temperature
(C) Remains constant
(D) Depends on external pressure
116. A force of 10 N acts on a body for 5 seconds. The change in momentum of the body is
(A) 2 kg·m/s
(B) 50 kg·m/s
(C) 10 × 5 = 50 kg·m/s
(D) None of these
117. The critical angle for total internal reflection occurs when the angle of incidence is
(A) Less than the critical angle
(B) Equal to the critical angle
(C) Greater than the critical angle
(D) 90°
118. The phenomenon of scattering of light by colloidal particles is known as
(A) Dispersion
(B) Reflection
(C) Diffraction
(D) Tyndall effect
119. The bending of light as it passes through different mediums is called
(A) Diffraction
(B) Reflection
(C) Refraction
(D) Polarization
120. Which device is used to convert mechanical energy into electrical energy?
(A) Transformer
(B) Motor
(C) Generator
(D) Rectifier
121. The acceleration of a body in uniform circular motion is directed
(A) Tangential to the motion
(B) Away from the center
(C) Towards the center
(D) Opposite to the motion
122. Two waves superpose to produce a resultant wave. This phenomenon is called
(A) Reflection
(B) Refraction
(C) Interference
(D) Diffraction
123. The energy of an electron in the nth orbit of hydrogen is given by
(A) En = -13.6/n² eV
(B) En = -13.6n² eV
(C) En = -13.6/n² eV
(D) En = 13.6n² eV
124. Which of the following is a scalar quantity?
(A) Displacement
(B) Velocity
(C) Force
(D) Work
125. The half-life of a radioactive substance is
(A) Proportional to its mass
(B) Proportional to its volume
(C) Independent of mass and volume
(D) Depends on its decay constant
126. A convex mirror is used as
(A) Searchlight
(B) Reflector in headlights
(C) Rearview mirror
(D) Magnifying glass
127. The property of a body to resist changes in its state of motion is called
(A) Momentum
(B) Inertia
(C) Force
(D) Acceleration
128. The equivalent resistance of two resistors in series is
(A) The sum of their resistances
(B) The difference of their resistances
(C) The reciprocal of the sum of their resistances
(D) The product of their resistances
129. An electric field is said to be uniform when
(A) Its direction changes with time
(B) Its magnitude decreases with distance
(C) Its magnitude and direction remain the same at all points
(D) None of the above
130. The SI unit of electric potential is
(A) Ampere
(B) Coulomb
(C) Ohm
(D) Volt
131. The process by which heat is transferred without the movement of particles is called
(A) Conduction
(B) Radiation
(C) Convection
(D) Diffusion
132. The power of a lens is measured in
(A) Joules
(B) Diopters
(C) Watts
(D) Hertz
133. The energy stored in a stretched spring is
(A) Kinetic energy
(B) Magnetic energy
(C) Elastic potential energy
(D) Heat energy
134. Which law explains the expansion of gases when heated?
(A) Newton’s law
(B) Charles’ law
(C) Boyle’s law
(D) Pascal’s law
135. The apparent weight of a body submerged in a fluid is
(A) Equal to its actual weight
(B) Greater than its actual weight
(C) Less than its actual weight
(D) None of the above
136. Which principle is used in hydraulic brakes?
(A) Archimedes’ principle
(B) Bernoulli’s principle
(C) Pascal’s law
(D) Newton’s third law
137. The center of mass of a rigid body depends on
(A) Shape of the body
(B) Mass distribution
(C) Orientation of the body
(D) Both (A) and (B)
138. Which of the following is not a unit of power?
(A) Watt
(B) Joule/second
(C) Horsepower
(D) Joule
139. The SI unit of angular momentum is
(A) Newton-meter
(B) Joule-second
(C) kg·m²/s
(D) kg·m/s
140. The motion of planets around the Sun is an example of
(A) Linear motion
(B) Centripetal force-driven motion
(C) Oscillatory motion
(D) Projectile motion
