Question # 1

If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

The reactance is the ratio of

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V_rms/I_rms

V_rms x I_rms

I_rms/V_rms

V_max x V_rms

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

When a motor is over loaded then the magnitude of back emf.

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Increases

Decreases

Remain constant

Zero

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat

The process of copying is:

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Axillugraphy

Chromatography

Xerography

Spectrography

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

The dimension of stress is

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[MLT^-1]

[ML^-1T]

[ML^-1T^-1]

[ML^-1T^-2]

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

The potential barrier for silicon is.

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0.7 V

0.5 V

0.3 V

0.9 V

The free electrons experience force.

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In direction of -E

In direction of E

Both A and B

All of the above

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

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