Question # 1

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

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two times

three times

four times

Half

The mutual inductance between two coils depends upon their

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Size

Core material

Size, core material and separation

Separation

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

Example of ductile substance is.

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Glass

Wood

Lead

Oxygen

Xc =

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1/2πfc

2πfc

2π/fc

fc/2π

A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:

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Doubled

Halved

Remain the same

One fourth

During negative half cycle of A.c then p-n junction offers.

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High resistance

Low resistance

No resistance

All of these

The internal resistance of a capacitor is called:

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Impedance

Resistance

Reactance

Conductance

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

The AC system is preferred to DC system because:

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AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm

The anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

Self induction does not depend on

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Number of turns of the coil

Area of cross section of the core

Nature of material of the core

Current through inductor

The shortest wave length is Bracket series has wave length.

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16/Rn

Rn/16

16 Rn

4 Rn

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

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