Question # 1

Electromagnetic induction obeys law of conservation

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Charge

Energy

Momentum

Mass

Closeness of the electric field lines is the measure of.

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Direction of field

Strength of field

Potential difference

Uniformity of field

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be

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136.0 volt

3.0 volt

13.6 volt

None of these

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

Choke consumes extremely small

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Current

Charge

Power

Potential

If the separation between the plates of a capacitor is doubled then its capacitance become.

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Double

Half

One fourth

Three times

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

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 circuit which compares the two voltages is.

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LDR

Sensor

Comparator

Logic gate

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

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

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

If we make magnetic field stronger the value of induced current is.

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Decreased

Increased

Vanishes

Remain constant

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