Question # 1

When we heat the metal at high temperature they emit:

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Holes

Protons

Neutrons

Electrons

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Positively charged

Either, a, b or c

The voltage is decreased by:

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Step-up transformer

Step-down transformer

A.C. generator

D.C. Motor

The end of solenoid from which lines of force emerge out is called:

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North pole

South pole

North and south pole

None of these

Which animal have ability to move his eye lens:

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Snake

Fish

Ant

Tiger

The instrument which is used to display the magnitude of changing electric current is called:

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Evacuated tube

Cathode rays oscilloscope

Television tube

Picture tube

According to Fleming's left hand rule the direction of force on the conductor is given by:

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Thumb

Fore finger

Middle finger

None of these

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

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 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

The output of a NAND gate is 0 when:

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Both of its inputs are 0

Both of its inputs are 1

Any of its inputs is 0

Any of its inputs is 1

One micro coulomb charge is equal to:

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10^-3c

10³c

10⁶c

10^-6c

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

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