Physics Past Questions and Answers

A ball of mass 0.1kg moving with velocity of 20ms-1 is hit by a force which acts on it for 0.02s. If the ball moves off in the opposite direction with a velocity of 25ms-1 , calculate the magnitude of the force.

A 25N
B 100N
C 125N
D 225N
E 250N

Question 317:

An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms^-2?

A Zero
B 2.5
C 10
D 12.5
E 100

Question 318:

In the electrical method of making a magnet, the polar the magnet formed depends on the ____________

A Amount of current passed
B Direction of the current
C Nature of the material used
D Orientation of the magnetic material in space
E Size of the magnetic material

Question 319:

Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?

A Both are inverted
B The magnification of Y is greater than one while that of X is one
C The magnification of Y is one while that of X is less than one
D Y is inverted while X is erect
E Y is real while X is virtual.

Question 320:

The electric potential at a distance d from a point charge q in air of permittivity e_o is expressed as ____________

A Q² ÷ 4πe_od
B Q² ÷ 4πe_o
C Q ÷ 4πe_od²
D Q ÷ 4πe_od
E Q ÷ 4πe_o²d