Narendra Kumar Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 3: HIGHER ORDER THINKING SKILL (HOTS)

A current-carrying straight conductor is placed in the East-West direction. What will be the direction of the force experienced by this conductor due to earth’s magnetic field? How will this force get affected on:
(a) reversing the direction of flow of current?
(b) doubling the magnitude of current?

An electron enters a magnetic field at right angles to it as shown in figure. The direction of the force acting on the electron will be:

You are given following current-time graphs from two different sources:
 

Name the type of current in two cases.

You are given following current-time graphs from two different sources:
 

Identify any one source for each type of these currents.

A circuit has a fuse of $2 \mathrm{A}$. What is the maximum number of $40 \mathrm{W}, 220 \mathrm{V}$ bulbs that can be safely used in the circuit?

A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is pushed into the coil.

A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is withdrawn from inside the coil.

A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is held stationary inside the coil?