IMSU Physics 2012/2013 Past Questions

Working electric motor takes a current of 1.5A when the pd across it is 250V. If its efficiency is 80%, the power output is

The primary coil of a transformer has N turns and is connected to a 120V power line. If the secondary coil has 1000 turns and a terminal voltage of 1200 volts. What is the value of N?

10^-2 means

The battery connection that permits current to flow across a p-n junction is called

A p-n junction diode is used as

When the base current of a common-emitter transistor is kept at zero, it operates in the

When connected to a mains of 250V, the fuse rating in the plug of an electric device of 1kW is

A current of 0.5A flow for 3h deposits 2g of a metal during electrolysis. The quantity of the same metal that would be deposited by a current of 1.5A flowing for 1h is

From the generation station power is transmitted at a very high voltage so as to reduce

Which of the following statement is true of the properties of a moving coil galvanometer?

The humidity of the air depends upon.

A student is at height 4m above the ground during a thunderstorm Given that the potential difference between the thunderstorm and the ground is 10⁷V, the electric field created by the storm is

In a Daniell cell, the depolarizer, positive and negative electrodes are respectively

A bread toaster uses a current of 4A when plugged in a 240 volts line it takes 1 minute to toast slices of bread. What is the energy consumed by the toaster?

Which software is more relevant to Engineering

Two long parallel wires X and Y carry currents 3A and 5A respectively, if the force experienced per unit length by X is 5 x 10^-5N, the force per unit length experienced by wire Y is

A 40kW electricity cable is used to transmit electricity through a resistor of resistance 2.0 ohms at 800V. The power loss as internal energy is

Lenz-s law is a law of the conservation of

A charge 50µC has an electric field strength of 360NC^-1. at a certain point. The electric strength due to another charge 120µC kept at the same distance apart and in the same medium is

The instrument that measures both a.c and d.c is