Question # 1

Lenz's law presented in

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1834

1934

1826

1836

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

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

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Spiral

Helix

Ellipse

Circular

One henry is equal to

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1 ohm x 1 sec

1 ohm x 1 hertz

1 ohm x 1 metre

All of above

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

NIBA =

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cθ

θ/c

c²θ

c²/θ

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

In case of capacitor, the unit of reactance is

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Farad

Ohm

Newton

All of these

The unit of Rh is.

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ms-1

m

m²

m^-1

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

A battery is used in

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ohmmeter

Ammeter

Galvanometer

Voltemeter

e/m=

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v/Br

Br/V

VB/r

Vr/B

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 unit of impedance is.

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Henry

Hertz

Ampere

Ohm

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

Efficiency of transformer does not affected by

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Input voltage

Core of transformer

Insulation between sheet

Resistance of coils

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