Match the following: 1. Overloading a. Switch 2. Magnetic effect of current b. Joule 3. Temporary magnet c. Oersted 4. Heating effect of current d. Flow of excess current 5. Make or break the circuit e. Loses its magnetism as soon as the current stop

1 - d It is a condition in which the flow of current in a circuit is beyond the prescribed maximum limit. This condition cause melting of fuse. 2 - c When an electric current passes through a wire, it creates magnetic field which can be detected by using magnetic compass. 3 - e An electromagnet acts as a magnet as long as electric current passes through it. It loses its magnetism as soon as the current stops flowing. 4 - b A scientist discovered that the flow of electricity generated heat. The energy of an electric current is converted into heat as it flows through a resistance. 5 - a An electric circuit contains a controller that regulate the open-ness or closed-ness of circuit. This component controls over current flow in a circuit. Hence, the correct answer would be: 1. Overloading d. Flow of excess current 2. Magnetic effect of current c. Oersted 3. Temporary magnet e. Loses its magnetism as soon as the current stops. 4. Heating effect of current b. Joule 5. Make or break the circuit a. Switch

E M B I B E

Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q D

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7th CBSE

IMPORTANT

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It is the material used to make fuse wire.
(Choose from the following- An alloy of tin and lead/ An alloy of iron and nickel/ An alloy of copper and zinc/An alloy of silver and copper)

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Important Questions on Electric Current and Simple Circuits

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7th CBSE

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Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q D

It is a device which automatically trips when there is excess of current in the circuit. (Maximum circuit breaker/ Miniature circuit breaker)

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Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q D

Name the following.
It is a device used to lift heavy iron articles.

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Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q D

The SI unit of current is:

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Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q D

Name the following: It is an appliance which detects the presence of current in the circuit.

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7th CBSE

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Expanded Universal Science 7>Chapter 16 - Electric Current and Simple Circuits>ASSESSMENT ZONE>Q E

Match the following:

1.	Overloading	a.	Switch
2.	Magnetic effect of current	b.	Joule
3.	Temporary magnet	c.	Oersted
4.	Heating effect of current	d.	Flow of excess current
5.	Make or break the circuit	e.	Loses its magnetism as soon as the current stop