Question # 1

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm

The most common source of an A.C. Voltage is.

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Motor

Cell

Generator

Thermo couple

In according with Bohr's theory the K.E of the electron is equal to:

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ke²/2r

Ze²/r

Ze²/r²

Ze²/2r²

Which of the following are not hadrons.

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Muons

Mesons

Positrons

Neutrons

The velocity of an oscillating charge as it moves to and fro along a wire is.

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Changing

Constant

Infinite

zero

The conductors having the conductivity of the order of

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The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

The motional emf is give by

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qvB

IBL

eBL

vBL

An electric field cannot deflect

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X-rays

a-particles

ß-particles

None of these

An alternating quantity (voltage or current) is completely known if we know its:

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Maximum

Frequency and phase

Effective value

Both (a) & (b)

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

NIBA =

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cθ

θ/c

c²θ

c²/θ

The following gas was identified in the sun using spectroscopy

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Hydrogen

Helium

Carbon

Nitrogen

An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case.

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6

5

4

3

Kirchhoff's first rule is the manifestation of the law of conservation of.

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Mass

Charge

Energy

Momentum

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