HARD
7th CBSE
IMPORTANT
Earn 100

What is nichrome wire made of?

Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 2
Why is nichrome wire useful in many electrical appliances?
HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 2
What is the filament of a light bulb usually made of?
HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 3

Look at the simple diagram of the components needed to demonstrate Hans Christian Oersted’s discovery.
Draw a similar diagram in your notebook, showing a closed circuit and the position of the compass needle after the circuit was closed.
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 3

In which direction is the deflection in your diagram?

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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 3
In which direction would the needle deflect if the terminals of the battery were reversed in the diagram given here?
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 4

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

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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 4
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.
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HARD
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 14 - Electric Current and Its Effects>STEP UP>Q 4

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