Question # 1

Resistance tolerance of silver band is.

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10%

6%

7%

5%

Reflecting mirrors in laser is used to

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Further stimulation

For producing more energetic lasers

Both (a) and (b)

None of these

The potential barrier for silicon is.

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0.7 V

0.5 V

0.3 V

0.9 V

What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10^-2 Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

The resistivity of --------------------decrease with the increase in temp

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Gold

Silver

Copper

Silicon

The SI unit of flux density is.

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NA-1 m2

NA-1 m-1

NAm-1

NA-1 m

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

Transistors are made from

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Plastics

Metals

Insulator

Doped semi conductors

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 highest value reached by the voltage or current is one cycle is called:

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Peak to peak value

Peak value

Instantaneous value

Root mean square value

The SI unit of stress is same as that of.

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Pressure

Force

Momentum

Work

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

The circuit in which current and voltage are in phase, the power factor is:

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Zero

1

-1

2

A galvanometer is an electrical instrument used to

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Measure resistance

Measure voltage

Detect passage of current

None of these

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

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