Adaptive Practice
Electromagnetism
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Easy
What happens to the magnetic field around a current-carrying wire when the current is increased?
Easy
Which material is commonly used to make the core of an electromagnet to increase its magnetic strength?
Easy
In an electromagnet, what effect does increasing the number of turns in the coil have?
Medium
Which of the following devices works on the principle of electromagnetic induction?
Medium
What is the direction of the magnetic field around a straight current-carrying conductor?
Medium
Which rule helps to find the direction of force on a current-carrying conductor placed in a magnetic field?
Medium
In an electric motor, what causes the rotation of the coil?
Medium
What is the effect of inserting a soft iron core inside a solenoid carrying current?
Hard
Which of the following correctly describes electromagnetic induction?
Hard
A coil of wire is connected to a galvanometer. When a magnet is moved towards the coil, the galvanometer shows a deflection. What happens if the magnet is held stationary inside the coil?