Question # 1

If 2 joules of energy is required to transfer one coulomb of charge from one point to another, the potential difference between these points will be:

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1V

2V

4V

6V

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

The intensity of lawn mover is:

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10-1 wm^-2

10-2 wm^-2

10-3 wm^-2

10-4 wm^-2

Image formed on a camera is:

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real,invertred, and diminished

virtual, upright and diminshed

virtual, upright and magnified

real, inverted and magnified

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

What is fitted in telephone receiver?

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Electromagnet

Diaphragm

Both a and b

None of these

A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:

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4 times smaller than before

4 times larger than before

8 times larger than before

16 times larger than before.

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

In medical field, C.R.O is used to display:

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Heart beats

Pictures of organs

Pictures of bones

Blood pressure

The equivalent resistance of a parallel combination is

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equal to sum of all resistance

is greater than the largest resistance of combination

is smaller than the smallest resistance of combination

All of these

In case of OR and AND operation, if switches s₁ and s₂ both are open then lamp is:

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On

Off

Sometimes on and sometimes off

Neither on nor off

The unit of power is _________

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Volt

Watt

Joule

Coulomb

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