The essential difference between an AC generator and a DC generator is that:

AC generator has slip rings while the DC generator has a commutator

AC generator has an electromagnet while a DC generator has permanent magnet

DC generator will generate a higher voltage

AC generator will generate a higher voltage

What is the role of the split ring in an electric motor?

Commutator or split ring changes the direction of current in the coil of the electric motor, after every half revolution. Note: Split ring is also known as commutator. The function of commutator rings is to reverse the direction of current flowing through the coil every time the coil just passes the vertical position during a revolution.

E M B I B E

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 18

HARD

10th CBSE

IMPORTANT

Earn 100

State and explain the Clock face rule for determining the polarities of a circular wire carrying current.

Important Questions on Magnetic Effect of Electric Current

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 19

Name any two factors on which the strength of a magnetic field produced by a current-carrying solenoid depends. How does it depend on these factors?

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 20

(a) Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.
(b) Describe how an electromagnet could be used to separate copper from iron in a scrap yard.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 21

How does an electromagnet differ from a permanent magnet?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 21

Name two devices in which electromagnets are used and two devices where permanent magnets are used.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 21

What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 21

Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 21

What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Long Answer Type Questions>Q 22

List three ways in which the magnetic field strength of a current-carrying solenoid can be increased?