Question # 1

The resonance frequency is given by:

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fr = 2π√LC

fr = 1/2πLC

fr = 1/ 2π√LC

f1 = 1/ 2πC√L

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

Helium Neon Laser Beam emitted from discharge tube has a colour.

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Blue

Green

Red

Black

The physical quantity related to photon, that does not change in Compton scattering is.

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Energy

Speed

Frequency

Wavelength

Platinum wire becomes yellow at a temperature of.

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900^oC

1300^oC

1600^oC

500^oC

X- ray diffraction reveals that these are

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Particle type

Wave type

Both wave and particle

None of above

Electric current produces magnetic field, was suggested by.

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Faraday

Oersted

Henry

Lenz

OR gate is represented by:

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X = A+B

X=A.B

X=A+B

X=A.B

A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking?

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25 m

1mm

2mm

0.5 m

Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

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

A resistance frequency the impedance of RLC parallel circuit is.

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Zero

Infinite

Maximum

Minimum

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

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

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