Physics Past Questions and Answers

The electrochemical equivalent of a metal is 0.126 x 10^-6 kgC^-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is

A 0.0378 x 10 ^-3kg
B 0.227 x 10 ^-3kg
C 0.378 x 10 ^-3kg
D 0.595 x 10 ^-3kg
E 2.268 x 10 ^-3kg

Question 22:

Ripples on water are similar to light waves in that they both

A Have the same wavelength
B Are longitudinal
C Cannot be reflected
D Travel at the same speed
E Can be refracted and diffracted

Question 23:

A piece of wood is floating on water. The forces acting on the wood are

A Upthrust and reaction
B Weight and reaction
C Weight and upthrust
D Upthrust and viscousity
E Weight and viscousity

Question 24:

Of the following derived units, the one that is not a unit of power is

A Joule/second
B Ampere volt
C Ampere²volt
D Volts²/ohm

Question 25:

a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds?

A 4ms^-1
B 10ms^-1
C 20ms^-1
D 50ms^-1
E 80ms^-1