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Electric Bulb and Electric Fuse

b Mark ‘T’ if...

Question

Question 9 (b)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.

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Solution

True
An electric fuse is used in electric circuits to safeguard the circuit and circuit elements from damages caused by overcurrent. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.

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Similar questions

Q. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)

(b) When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)

(c) An electromagnet does not attract a piece of iron. (T/F)

(d) An electric bell has an electromagnet. (T/F)

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Current flows through a circuit when it is open. ( )
2. Electric bell is based on the heating effect of current. ( )
3. An electric bell has an electromagnet. ( )
4. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. ( )
5. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. ( )
6. The magnetic strength in a conductor decreases with the increase in current. ( )

Q. When the current flowing through the fuse wire exceeds the safety limit, then it will be ______ breaking the circuit.

Question 2

Choose the statement which is not correct in the case of an electric fuse.

(a) Fuses are inserted in electric circuits of all buildings

(b) There is a maximum limit on the current which can safely flow through the electric circuits

(c) There is a minimum limit on the current which can safely flow in the electric circuits

(d) If a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit

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Electric Bulb and Electric Fuse

Standard VII Physics

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