EASY
7th CBSE
IMPORTANT
Earn 100

Does every conductor heat up when an electric current is passed through it? What does the amount of heat depend on? Name the conductor normally used in heating appliances.

Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q C
 A domestic circuit develops a short circuit. What will be the effect on a fuse wire connected in the circuit?
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q C
What is a miniature circuit breaker?
HARD
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q C
Draw the symbols used in a Circuit for—a battery of four cells, a switch, a lamp.
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q D
Draw a circuit diagram of a dry cell connected to a bulb through a switch. Mark the positive and negative terminals of the cell, and the direction of flow of current in the diagram. 
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q D
How can you increase the magnetic strength of a solenoid? 
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q D
What is an electromagnet? Give three uses of electromagnets. 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q D
Explain the working of a simple electric bell.
EASY
7th CBSE
IMPORTANT
Living Science 7>Chapter 17 - Electric Current and Its Effects>EXERCISES>Q 1
Fuse wires or miniature circuit breakers are not used in a circuit containing electric cells. Why?