Question # 1

The charge number of Ba is.

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197

141

56

85

The ability of a body to return to its original shape is called.

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Strain

Stress

Elasticity

Plasticity

The photo copying process is called

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Xerography

Inkjet Printer

Both (a) and (b)

None of these

Which is true for both alpha particle and gama rays.

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They cause ionization in air

They can be deflected by electric field

They can be deflected by magnetic field

The y can penetrate a few millimeters of aluminium

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

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

Electrons are

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Hadrons

Laptons

Quarks

Baryons

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

When the K.E. of photoelectric is zero, the frequency of incident photon is.

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Less than

greater than

Equal to

Much greater

In chopke coil the resistance X_L an resistance R are:

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X_L=R

X_L<<R

X_L>>R

X_L=∞

Electromagnetic induction obeys law of conservation

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Charge

Energy

Momentum

Mass

The Grid 'G' in cathode ray oscilloscope.

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Accelerate as well as focus electron beam

Control no. of electrons beam

Is at - Ve potential with respect to cathode.

Both d and b

In Helium Neon laser, the discharge tube is filled with

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80% He, 20% Neon

85% He, 15% Neon

83% He, 17% Neon

90% He, 10% Neon

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

In case of op-amp as an inverting amplifier, V₊ - V_- = 0, this is because

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Open gain loop is very low

Closed loop gain is very high

Open loop gain is very high

Both (a) and (a)

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

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