EASY
10th ICSE
IMPORTANT
Earn 100

What is an electromagnet ? Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.

Important Questions on Electro-Magnetism

MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 24
The figure given below, shows the current flowing in the coil of wire wound around the soft iron horse shoe core. State the polarities developed at the ends A and B.
Question Image
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 25
State two ways through which the strength of an electromagnet can be increased.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 26
Name two device that uses an electromagnet.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 27
State two advantages of an electromagnet over a permanent magnet.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 28
State two differences between an electromagnet and a permanent magnet.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 29
Why is soft iron used as the core of the electromagnet in an electric bell?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 30
How is the working of an electric bell affected, if alternating current be used instead of direct current?
HARD
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 31
The incomplete diagram of an electric bell is given below. Complete the electric circuit diagram and label its different parts.
Question Image