Question # 1

The natural frequency of L.C circuit is equal to

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The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

The induced emf in a coil is proportional to:

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Magnetic flux through the coil

Rate of change of Magnetic flux through the coil

Area of the coil

Product of magnetic flux flux and area of the coil

One weber is equal to:

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N.A ²/m

N.m²/A

N.A/m

N.m/A

When a wire of length 'l' and resistance R is cut into two equal parts then resistivity of each part.

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is doubled

Remains the same

Is halved

Is one fourth

The galvanometer can be made sensitive by making the factor BAN/C

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Large

Small

Constant

Zero

The flow of D.C current is opposed by

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Resistor

Induction

Capacitor

All of these

Unit of impedance is:

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Ohm

Ohm^-1

no unit

Ohm m^-1

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

Which one is not present in A.C. generator.

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Armature

Magnet

Slip rings

Commutator

What is the resistance of carbon resistor which has band brown black brown.

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100 Ohm

1000 Ohm

10 Ohm

1.0 Ohm

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

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