Physics MCQS

661. The dimension of velocity is:
A. [LT]
B. [LT2]
C. [LT-1]
D. [LT-2]

662. Which law is applicable in the motion of the rocket in space?
A. Conservation of mass
B. Conservation of energy
C. Conservation of angular momentum
D. Conservation of linear momentum

663. If a body is moving at the same speed, then:
A. Its direction may be changing
B. Its acceleration is variable
C. Its acceleration is zero
D. None of the above

664. If the velocity of a body is uniform, the velocity-time graph is a straight line which is:
A. Parallel to x-axis
B. Parallel
C. At an angle of 45 degrees with the x-axis
D. Along the y-axis

665. If the instant velocity does not change, the body is moving with:
A. Initial velocity
B. Variable velocity
C. Uniform velocity
D. None of these

666. Acceleration is:
A. Scalar quantity
B. Vector quantity
C. Constant quantity
D. None of these

667. Deceleration means the speed of the body is:
A. Increasing
B. Decreasing
C. Just moving
D. None of these

668. At the highest point, the vertical component of the velocity of the projectile becomes:
A. Zero
B. Maximum
C. Minimum
D. -1

669. A force of 10 N makes an angle of 30 degrees with the y-axis. The magnitude of the x-component is:
A. 5 N
B. 8.66 N
C. 10 N
D. Zero

670. A 20-F capacitor is charged to 200 V. Its stored energy is:
A. 4000 J
B. 4 J
C. 0.4 J
D. 2000 J