Question # 1

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

An electromagnetic wave goes from air to glass which of the following does not change?

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Radio waves

X-rays

Ultra violet radiation

Ultra sond waves

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

An ECG records the _____ between points on human skin generated by electric process i the heart.

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Heart beat

Pulse rate

Pressure

Voltage

Presence of dielectric between two charges always.

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Reduces the electric force

Enhance the electric force

Does not effect electric force

Double the electric force

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

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 SI unit of magnetic induction Tesla is equal to

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N-1 Am

NA m2

NA-1n2

NA-1m-1

1 amu is equal to

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1.0606 x 10^-27 kg

1.66 x 10^-31 kg

1.66 x 10^-34 kg

1.66 x 10^-19 kg

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