Question # 1

Which of the following has least hysteresis loop area.

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Steel

Wrought Iron

Soft Iron

Cobalt

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

Which one of the following is ductile substance.

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Copper

Lead

Wrought iron

All of them

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

In three phase A.C supply coils are inclined at an angle of.

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0^o

90^o

120^o

80^o

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

The magnitude of motional emf is given by

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The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

Albert Einstein got noble prize in:

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1926

1921

1918

1931

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

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