Magnetic Effects of Electric Current Quiz — 7 Free Questions

Question 1

Why is soft iron, specifically, used as the core in an electromagnet, rather than steel?

Question 2

Fleming's left-hand rule finds the direction of force on a current-carrying conductor. A different, related rule finds the direction of an INDUCED current instead. What is that rule called?

Question 3

What does the direction of a magnetic field line at any point actually show?

Question 4

Why do magnetic field lines never cross each other?

Question 5

Which hand rule is used in a motor to find force, and which is used in a generator to find induced current?

Question 6

Does a current-carrying conductor, when placed in a magnetic field, experience any force?

Question 7

What is the potential difference between the neutral wire and the earth, under normal conditions?

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About Magnetic Effects of Electric Current

This quiz covers Chapter 4 of CBSE Class 10 Physics, Magnetic Effects of Electric Current.

It opens with magnetic fields and field lines around a bar magnet, then covers the magnetic field produced by a current-carrying straight conductor, a circular loop, and a solenoid, along with the right-hand thumb rule.

It then moves to the force on a current-carrying conductor placed in a magnetic field, using Fleming's left-hand rule, and how this force is used inside an electric motor.

The quiz continues with electromagnetic induction, Fleming's right-hand rule, and how an electric generator produces alternating and direct current.

It closes with domestic electric circuits: live, neutral, and earth wires, short circuits, overloading, and the safety devices used to prevent electrical accidents at home.

Every question comes with a clear, simple explanation, so incorrect answers become as instructive as correct ones, whether you are revising for a school test or a board exam.