HARD
7th CBSE
IMPORTANT
Earn 100

Study this picture of a simple electromagnet and answer the question. 
Correct the diagram to allow electricity to flow through the circuit.

Question Image

Important Questions on Electric Current and Its Effects

HARD
7th CBSE
IMPORTANT
Study this picture of a simple electromagnet and answer the question. 
Would the electromagnet work if the wire that is wrapped around the core were not insulated? Explain your answer.
Question Image
HARD
7th CBSE
IMPORTANT

Study this picture of a simple electromagnet and answer the question. 
What would happen if the direction of electric current were reversed?
Question Image

HARD
7th CBSE
IMPORTANT
How would you identify the poles of the electromagnet using a light bar magnet?
EASY
7th CBSE
IMPORTANT
In an electric cell, chemical energy is converted into _____ energy.
MEDIUM
7th CBSE
IMPORTANT

Electricity is a form of energy. Energy can be converted from one form to another. Fill in the blanks with words from the box.
(mechanical, heat, electrical, light)

When we run an electric grinder in the kitchen, electrical energy is converted into _____ energy.

EASY
7th CBSE
IMPORTANT

Here is a simple diagram of an electric bell. At which points do the chemical energy to electrical energy conversion take place?


Question Image  

EASY
7th CBSE
IMPORTANT
Here is a simple diagram of an electric bell. At which points do the following energy conversion take place? 
Question Image
The instrument that converts electrical energy to electromagnetic energy.
EASY
7th CBSE
IMPORTANT

Here is a simple diagram of an electric bell. At which points do the following energy conversions take place? Select the correct answer.

Question Image

Electromagnetic energy to mechanical energy in :