Question # 1

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

Unit of Stephen's constant is

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W m K^-2

W m^-2 K^-4

W m K^-4

None

Hydrogen bomb is an example of.

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Nuclear fission

Nuclear fusion

Chain reaction

Chemical reaction

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

Study of hydrogen visible spectrum in

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1886

1887

1895

1885

Charge on an atom is:

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Positive

Negative

Neutral

None of these

B2/2p is the expression of.

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Lenz's law

Magnetic energy

Magnetic energy density

Back emf

In gas the charge carriers are:

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Electrons

Ions

Both a & b

None of above

The illustration of the phenomenon of mutual induction is in the device of

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Transformer

Inductor

A.C. Generator

Ammeter

Iodine -131 is used for the treatment by

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Bones

Eyes

thyroid glands

Lungs

Black Body radiation spectrum is an example of:

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Atomic spectra

Line spectra

Continuous spectra

None of above

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

For inducing emf in a coil the basic requirement is that:

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Flux should link the coil

Change in flux should link the coil

Coil should form a closed loop

Both (b) and (c) are true

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

A solid in which there is not regular arrangement of molecules is called.

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Glassy solid

Amorphous solid

Crystalline solid

Both a and b

The electric intensity at infinite distance from the point charge is

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Infinite

Zero

Positive

Negative

If force in the direction of velocity of conductor, then induced current is directed,

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Anti clockwise

Clock wise

At equilibrium

None of above

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

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