Question # 1

Capacitance of a capacitor does not depend upon.

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Distance between plates

Area of plates

Electric field between plates

Medium between plates

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

The combined effect of resistance and reactance is knows as.

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Inductance

Conductance

Resistance

Impedance

In case of A.C. through resistor V and I are

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At 0^o with each other

At 180 ^o with each other

At 90^o with each other

At 270 ^o with each other

Light emitting diodes are made from semiconductors.

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Silicon

Germanium

Carbon

Gallium arsenide

The value of Rydberg constant is

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1.0974 x 10⁷ m^-1

1.0974 x 10^-7 m^-1

1.0974 x 10⁶ m^-1

1.0974 x 10^-6 m^-1

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

Electromagnetic induction is exactly according to law of:

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Momentum

Charge

Energy

Mass

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

In modulation, low frequency signal is known as

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Carrier wave

fluctuated signal

Modulated carrier signal

Modulation signal

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above

The mass of an object will be doubled at speed.

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2.6 x 10⁸ m/s

1.6 x 10⁸m/s

2.6 x 10⁷m/s

3.6 x 10⁷ m/s

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

Electric power:

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Vx1

V²x1

V/1

V/1²

Boher proposed his atomic model in:

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1910

1911

1912

1913

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