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Electricity and Magnetism


13. 

A 100 watt bulb will consume on unit of electrical energy in

Answer : B. 10 hour

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14. 

Consider the following statements: An ordinary light bulb has a rather short life because the
1.) filament wire is not uniform
2.) bulb cannot be evacuated completely
3.) wires supporting the filament melt at high temperature
which of the above statements are correct?

Answer : B. 2 and 3

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15. 

Consider the following statements:
Assertion (A ): Soft iron is used magnetic shielding
Reason(R ): Soft iron attracts maximum number of magnetic items into it

Answer : B. A,R both are right

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16. 

The instrument which is used to measure the current flowing through a circuit is

Answer : B. ammeter

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17. 

In a AC Circuit containing capacitance only,

Answer : B. current leads the emf by p/Π

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18. 

When a wave goes from one place to another it transports

Answer : B. Energy

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