Question # 1

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

Unit of self inductance is

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Weber

Tesla

Henry

Farad

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

The typical nuclei are less than:

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10^-16m

10^-14m

10^-12m

10^-10m

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

The direction of induced current is always so as to oppose the change which causes the current is:

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Faraday's law

Lenz's law

Ohm's law

Kirchhoff's 1st rule

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

Lenz's law deals with

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Magnitude of emf

Direction emf

Direction of induced current

Resistance

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

_____ has the largest de Broglie wavelength at same speed.

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Proton

Alpha particle

Carbon atom

Electron

Mutual induction has a practical role in the performance of the.

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Radio choke

Transformers

A.C. Generator

D.C. Generator

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

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4.5 eV

4.25 eV

4.75 eV

0.25 eV

Energy of Black body radiation depends upon

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Nature of surface of body

Nature of material of body

Shape and size of body

Temperature of the body

In case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

The mass of proton in amu is:

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1.07276

1.7276

1.007276

1.0007276

The potential difference between the top and bottom of a cloud chamber is of the order of

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290 v

400 v

1 kv

None of above

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