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 8

EASY

10th CBSE

IMPORTANT

Earn 100

Draw a diagram to show the magnetic field lines around a bar magnet.

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 9

What is a magnetic field? How can the direction of magnetic field lines at a place be determined?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 10

Explain why, two magnetic field lines do not intersect each other.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Short Answer Type Questions>Q 11

When an electric current is passed through any wire, a magnetic field is produced around it. Then why an electric iron connecting cable does not attract nearby iron objects when an electric current is switched on through it?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Long Answer Type Questions>Q 12

Define magnetic field lines. Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Long Answer Type Questions>Q 12

Explain why a freely suspended magnet always points in the north-south direction?

EASY

10th CBSE