Question # 1

The step-up transformer

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Increases the input current

Increase the input voltage

Has more turns in the primary

Has less turns in hte secondary coil

Which statement is true about the magnetic poles?

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

What is the direction of the magnetic field lines inside a bar magnet?

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines.

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

Who discovered Electromagnetic induction?

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Michael Faraday

Flemiing

Ohm

Coulomb

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

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Circular

Straight

Solenoid

None of these

The ray of light after reflection from concave mirror passes through:

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Centre

Principal focus

Pole

Radius

In compound microscope, the objective have focal length than eye-piece:

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Smaller

Larger

Equal

Equal and larger

In NOT gate number of input terminals is/are:

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1

2

3

4

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

The true ratio of a transformer is 10. It means:

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Vs = 10Vp

Ns = Np/10

Ns = 10NP

VS= Vp/10

D.C. motor converts.

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Mechanical energy into electrical energy

Mechanical energy into chemical energy

Electrical energy into mechanical energy

Electrical energy into chemical energy

The voltage is decreased by:

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Step-up transformer

Step-down transformer

A.C. generator

D.C. Motor

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10th Class Physics Chapter 15 Electromagnetism English Medium KPK Boards Online Mcqs MCQs With Answers

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