Question # 1

The slope of q-t curve at any instant of time gives.

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Voltage

Current

Charge

Botha a and b

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

Commutator was invented in

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1834

1820

1840

1835

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

If the distance between two charges is halved and charges are also doubled, then force between them will be.

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Two time

Four time

Eight time

Sixteen time

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

The effective way to increase the sensitivity of moving coil galvanometer is.

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Increase the area of coil

Increase the number of turn

Increase the magnetic field

Increase the value of constant C

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

The unit of induced emf is

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Ampere

Volt

Joule/coulomb

Both (b) and (c)

When the K.E. of photoelectric is zero, the frequency of incident photon is.

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Less than

greater than

Equal to

Much greater

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

The magnetic flux will be max, For an angle of:

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0°

60°

90°

180°

Automatic function of street light can be done by the use of.

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Inductor

Rectifier

Comparator

emf

mho -m-1 is the unit of.

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Resistance

Resistivity

Conductance

Conductivity

The combined effect of resistance and reactance is knows as.

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Inductance

Conductance

Resistance

Impedance

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

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