Question # 1

Power dissipation is a pure inductive or in a pure capacitance circuit is:

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10⁶

0

10^∘

Maximum

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

Which is not characteristic of Laser.

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Monochromatic

Coherent

Intense

Multi direction

The middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

Radius of first Bohr's orbit is.

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0.053 nm

0.053 mm

0.053 micro meter

0.053 m

The solid with definite M.L are called:

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Crystalline

Amorphous

Polymeric

None of above

Phase difference between V and I of an A.C through resistor is.

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Zero Degree

90 ^o

80^o

120^o

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

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

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

In case of A.C. through resistor V and I are

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At 0^o with each other

At 180 ^o with each other

At 90^o with each other

At 270 ^o with each other

If magnetic field is doubled then magnetic energy density becomes.

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Four times

Two times

Three times

Six times

The energy of photon for photoelectric effect is less than

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1 MeV

2 MeV

5 MeV

8 MeV

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

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