Physics Past Questions and Answers

Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance of 1.0m. Calculate the magnitude of the force of attraction between them. [G = 6.70 x 10^-11Nm^-2kg^-2]

A 6.70 x 10^-11N
B 6.70 x 10^-10N
C 6.03 x 10^-11N
D 6.03 x 10^-7N

Question 3072:

The magnitude of the gravitational attraction between the earth and a particle is 40N. If the mass of the particle is 4kg. Calculate the magnitude of the gravitational field intensity of the earth on the particle

A 10.0N kg^-1
B 12.6N kg^-1
C 25.0N kg^-1
D 160.0N kg^-1

Question 3073:

Local actions is normally prevented in a simple electric cell by

A Introducing an oxidizing agent in the acid
B Not drawing current continously for long period
C Amalgamating the surface of the zinc plate
D Using a porous pot to isolate the zinc plate from the acid

Question 3074:

The lead-acid accumulator consists of a

A Lead as the positive electrode
B Lead ocide as the negative electrode
C Hydrochloric acid as the electrolyte
D Tetraoxosulphate(VI) acid as the electrolyte

Question 3075:

Which of the following actions will not lead to an increase in the induced e.m.f. in a coil of wire rotating between the poles of a magnet? Increasing the

A Strength of the magnet
B Number of turns in the coil
C Speed of location in the coil
D Gap between the poles of the magnet