EASY
7th CBSE
IMPORTANT
Earn 100

What is the usual name of magnets whose magnetism can be turned on or off as desired? 

Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 25
Which effect of electric current is utilized in making electromagnets? 
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 26
Of which material is the coil of an electromagnet usually made?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 27
Which of the two is used to load heavy iron girders on to a ship—an electromagnet or a permanent magnet? 
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 28
Can we use a U-shaped permanent magnet in making an electric bell? 
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 29
Write the full form of MCB. 
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 30
The conducting path through the bulb, wires, switch and battery is called an electric _____.
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 30
Longer line in the symbol for a cell represents its _____ (negative/positive) terminal.
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Very Short Answer Type Questions>Q 30
The short and thick line in the symbol of a cell represents its _____ (positive/negative) terminal.