Question # 1

A battery move a charge of 40 C around a circuit at constant rate in 20 Sec. The current will be.

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2 A

0.5 A

80 A

800 A

High frequency radio wave is called as

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Fluctuate

Carrier wave

Matter wave

Mechanical wave

In three phase A.C. generator the phase difference between each pair of coil is.

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45^o

90^o

120^o

60^o

Choke consumes extremely small

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Current

Charge

Power

Potential

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

Average value of current and voltage over a complete cycle is.

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Positive

Negative

Zero

Infinite

Which series lies in the ultraviolet region.

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Balmer series

Bracket series

Ptund series

Lyman series

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

A transistor has parts:

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2

3

4

5

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

The power factor of RL series circuit is.

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0

1

Less then 1

More than one

If I_o is the peak value of current, then its root mean square value is given by

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2 I_o

I_o

0.7 I_o

The amount of energy equal to 1.6 x 10^-18 J is called.

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One volt

One milli volt

One electron volt

One mega electron volt

The unit of strain is:

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Nm

Nm^-2

no unit

Nm²

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

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two times

three times

four times

Half

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

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