Question # 1

Substance which break just after the elastic limit is reached are called as.

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Ductile substances

Hard substances

Britto substances

Soft substances

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None of the above

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

DC generator by william Sturgeon in:

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1894

1961

1834

1961

Joule second is the unit of.

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Energy

Wein's constant

Planck's constant

Boyle's law

Before and after nuclear reaction the number of protons and neutrons:

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Must be different

Must be decreased

Must be increased

Remains same

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows

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0.20 C

2.5 C

5.0 C

10.0 C

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

_____ has the largest de Broglie wavelength at same speed.

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Proton

Alpha particle

Carbon atom

Electron

Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?

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3 RΩ

2R /4Ω

R/3Ω

2R /3Ω

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

The value of Rydberg constant is:

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1.0749x10⁷m^-1

1.0974 x 10⁷ m^-1

1.974 x10⁶m^-1

1.0974 x 10^-7 m^-1

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

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