Question # 1

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

The following gas was identified in the sun using spectroscopy

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Hydrogen

Helium

Carbon

Nitrogen

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

A particles equal or greater in mass than of protons are called.

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Baryons

Leptons

Mesons

Quarks

mho -m-1 is the unit of.

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Resistance

Resistivity

Conductance

Conductivity

Efficiency of transformer does not affected by

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Input voltage

Core of transformer

Insulation between sheet

Resistance of coils

The unit of Rh is.

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ms-1

m

m²

m^-1

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

X=A+B is the mathematical notation for.

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OR gate

NOR gate

NAND gate

AND gate

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

Two resistance of 2 Ohm each are connected in parallel combination equivalent resistance will be.

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4 Ohm

2 Ohm

1 Ohm

8 Ohm

If D.C. input for step up transformer, the output is

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Zero

High

Low

May be high or low

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