Question # 1

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

The first laser was built by

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ArthursSchawalow

T.H.Maiman

Peter Sorokin

C.H.Townes

The mutual inductance of the coils depends upon.

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Stiffness of the coils

Density of coils

Material of coils

Geometry of the coils

The unit of impedance is.

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Henry

Hertz

Ampere

Ohm

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

Bremsstrahlung radiation are examples of

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Atomic spectra

Molecular spectra

Continuous spectra

Discrete spectra

Balmer series lies in

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Visible region

Invisible region

Ultraviolet region

Infrared region

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

The peak value of A.C source is 20 A, then its rms value will be.

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14.1 A

10 A

20 A

28.2 A

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

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

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

The only difference between the construction of D.C and A.C is.

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Carbon burshes

Coil

Commutator

Magnetic field

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