142- What will be the value of acceleration if a body of mass 0.5 kg is acted upon by a force of 10 N?
A. 40 m/s²
B. 5 m/s²
C. 10 m/s²
D. 20 m/s²
View Answer
Answer : D. 20 m/s²
Description
143- What is the time rate of change of linear momentum?
A. Acceleration
B. Force
C. Velocity
D. Work
View Answer
Answer : B. Force
Description
144- Radiations are dangerous to living organisms because they damage the cell by:
A. Producing ions in the cells
B. Increasing the temperature of cells
C. Decreasing the number of cells
D. Destroying the cells
View Answer
Answer : A. Producing ions in the cells
Description
145- Which of the following results in the centripetal acceleration produced in a body?
A. Change in the magnitude of velocity
B. Change in mass
C. Change in the magnitude of force
D. Change in the direction of velocity
View Answer
Answer : D. Change in the direction of velocity
Description
146- 1 radian is equal to:
A. 0.573°
B. 5.73°
C. 57.3°
D. 573°
View Answer
Answer : C. 57.3°
Description
147- A wheel of a bike rotates from rest and achieves 6.28 radian/sec in 2 seconds. What will be its angular acceleration?
A. 1 rad/sec²
B. 1.5 rad/sec²
C. 3.14 rad/sec²
D. 6.28 rad/sec²
View Answer
Answer : C. 3.14 rad/sec²
Description
148- The ratio between linear velocity and radius equals to:
A. Angular displacement
B. Angular velocity
C. Angular acceleration
D. Angular momentum
View Answer
Answer : B. Angular velocity
Description
149- Which law has a graph similar to the graph of an isothermal process?
A. Boyle’s law
B. Charle’s law
C. Avogadro’s law
D. Law of heat exchange
View Answer
Answer : A. Boyle's law
Description
150- Due to sudden rain, which of the following is true for the car moving on the road?
A. Force of the engine decreases
B. Balance will not be maintained
C. Direction of motion will be affected
D. Linear momentum increases
View Answer
Answer : D. Linear momentum increases
Description
151- Which of the following are the applications of Doppler's effect?
A. Hologram technology
B. Measuring the speed of automobiles
C. Determining the speed of light in mediums
D. Sending radar signals
View Answer
Answer : B. Measuring the speed of automobiles
Description
152- Longitudinal waves exhibit:
A. Polarization
B. Particle nature
C. Property of energy transmission in space
D. Phenomena of superposition of waves
View Answer
Answer : D. Phenomena of superposition of waves
Description
153- The property of the system that does not change during adiabatic change is:
A. Temperature
B. Volume
C. Pressure
D. Amount of heat
View Answer
Answer : D. Amount of heat
Description
154- Which statement is the best for electric flux of a point charge?
A. Independent of charge
B. Independent of medium
C. Independent of the shape of the surface in which the charge is enclosed
D. Independent of the position of the charge in the shape
View Answer
Answer : C. Independent of the shape of the surface in which the charge is enclosed
Description
155- In beta positive decay, the nuclear number is:
A. Conserved
B. Not conserved
C. Unstable
D. Stable
View Answer
Answer : A. Conserved
Description
156- Which of the following expressions is constant for a freely falling body?
A. mgh + mv²
B. mgh + ½mv²
C. mgh – mv²
D. mgh – ½mv²
View Answer
Answer : B. mgh + ½mv²
Description
157- The product of frequency and wavelength of a wave equals to:
A. Displacement of the wave
B. Amplitude of the wave
C. Speed of the wave
D. Time period of the wave
View Answer
Answer : C. Speed of the wave
Description
158- Two bodies of masses 10 kg and 40 kg are dropped from the same height at the same time. The value of which of the following remains the same during the motion of the two bodies?
A. Acceleration
B. Kinetic energy
C. Potential energy
D. Power
View Answer
Answer : A. Acceleration
Description
159- A body of mass 4 kg is moving in a circle of radius 2 m. If the body moves around a complete circle, what is the work done by the body?
