MEDIUM
7th CBSE
IMPORTANT
Earn 100

State two important uses of electromagnets. 

Important Questions on Electric Current and Its Effects

MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Short Answer Type Questions>Q 50
Why do we use iron for making an electromagnet and not steel? 
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 51
What is an electromagnet? Explain in your own words, how to make an electromagnet. Draw a labelled diagram to show the circuit of the electromagnet.
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 52
Mention two advantages of an electromagnet over a permanent magnet. What type of magnet is used in an electric bell? Draw a labelled diagram of an electric bell? 
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 53
What is meant by the heating effect of current? Name two appliances which work on the heating effect of current. 
 
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 53
Explain why, the current that makes the heater element very hot(red-hot), only slightly warms the connecting wires leading to the heater.
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 54
What is meant by a battery? How will you arrange two cells to make a battery? Explain with the help of a diagram. Mark the terminals (+ and -) of both the cells. 
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 55

Name any five electrical appliances in which the heating effect of current is utilised. 
 

MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Long Answer Type Questions>Q 55

Explain why, when the current is switched on through a wire, the needle of a compass kept nearby gets deflected from its north-south position.