Question # 1

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate:

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The rod and the paper are oppositely charged

The rod acquires a positive charge

The rod and the paper have the same charges

The rod acquires a negative charge

When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

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The same as direction of field

Opposite the direction of field

Makes an angle of 45^owith the current

At right angle to both the field and the current.

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

Transformer which increase voltage is called.

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Step-up transformer

Step down transformer

D.C.Moter

A.C.genrator

In NOT gate number of input terminals is/are:

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1

2

3

4

The lines will be in the form of concentric circles, if conductor is:

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Circular

Straight

Solenoid

None of these

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B is 1

Both a and b are 0

Both a and b are 1

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Physics 10th Class English Medium Unit 6 Online Test MCQs With Answers

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