Question # 1

NIBA =

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cθ

θ/c

c²θ

c²/θ

Resistance tolerance of silver band is.

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10%

6%

7%

5%

The reactance of inductor depends upon

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L

All of the above

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

Useful device to measure resistance, current and voltage is an electronic instrument called.

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

The minimum energy required for occurrence of pair production is:

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1.022eV

1.02keV

1.02Me.V

1.04MeV

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

Step up transformer is used.

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Step up D.C. voltage

Step up A.C. voltage

Step up both A.C and D.C.

Step up A.C. current

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

Very weak magnetic field produced by brain can be detected by

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MRI

CAT scans

Squid

CRO

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

Glass and high steel carbon are example of.

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Ductile substances

Brittle substances

Soft substances

Hard substances

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

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