Question # 1

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

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Carbon burshes

Coil

Commutator

Magnetic field

In carbon resistors, then value of Blue colour is.

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6

7

8

9

The P.D develop in case of germanium is:

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0.3

0.7

0.5

0.9

After curie temperature.

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Ferromagnetic

Paramagnetic

Magnetic

Diamagnetic

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

The force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

Power dissipation in A.C circuit is expressed as:

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P =I_rms x V_rms Sinθ

IxVCosθ

I_rmsxV_rmsCosθ

I_rms x V_rms Sin2θ

Which one is not a crystalline solid.

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Zinc

Copper

Nylon

None of these

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

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Half

Two

Four times

One fourth

Electromagnetic induction obeys law of conservation

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Charge

Energy

Momentum

Mass

Resistivity at a given temperature depends upon.

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Area of cross section

Length

Nature of material of conductor

Both length and area

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

Insulators have:

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An empty conduction band

Al full valence band

A large energy gap

All of above

The energy of 4th Orbit in hydrogen atom is.

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-2.51 eV

-3.50 eV

-13.60 eV

-0.85 eV

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

Earth orbital speed is

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10 km/s

20 km/s

30 km/s

40 km/s

Mutual induction has a practical role in the performance of the.

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Radio choke

Transformers

A.C. Generator

D.C. Generator

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