Physics Past Questions and Answers

if âˆ†x is the uncertainty in the measurement of the position of a particle along the x-axis and âˆ†P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as

A âˆ†x âˆ†P_x â‰¥ h
B ∆x ∆P_x = 0
C âˆ†x âˆ†P_x < h
D âˆ†x âˆ†P_x = âˆž

Question 982:

If âˆ†x is the uncertainty in the measurement of the position of a particle along the x-axis and âˆ†P_a is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as

A âˆ†x âˆ†P_x â‰¥ h
B ∆x ∆P_x = 0
C âˆ†x âˆ†P_x < h
D âˆ†x âˆ†P_x = âˆž

Question 983:

The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

A 8.0 ms^-2, 4,0 ms^-2
B 4.0 ms^-2, 8.0 ms^-2
C 4.0 ms^-2, 2.0 ms^-2
D 2.0 ms^-2, 4.0 ms^-2

Question 984:

The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W

A 13.3N
B 20.0N
C 40.0N
D 80.0N

Question 985:

The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

A The solid will fall over if the vertical line through G lies outside the base
B The solid will fall over if the vertical line through lies inside the base
C The solid will not fall over if the vertical line through G lies outside the base
D The solid can never fall over