Question # 1

Bremsstrahlung radiation are examples of

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Atomic spectra

Molecular spectra

Continuous spectra

Discrete spectra

Energy density in an inductor is.

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Directly proportional to magnetic field

Directly proportional to square of magnetic field

Inversely proportional to magnetic field

Inversely proportional to square of magnetic field

The radioactive decay obeys the law

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Tolerance of "Gold" band.

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±10%

±5%

±15%

±20%

The phase angle of a series RLC circult at resonant frequency is

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1/2

sigma

Zero

sigma /4

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

Which is not characteristic of Laser.

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Monochromatic

Coherent

Intense

Multi direction

Which diode works at reverse biasing.

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LED

Photo voltaic cell

Photo diode

Silicon diode

The first spectral lines were discovered in 1885, were

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Paschen series

Balmer series

Pfund series

Bracket series

Materials can be identified by measuring their

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Mass

Half life

Both a and b

None of a,b,c

Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

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50 Hz

100 Hz

80 Hz

120 Hz

Domains are existed in

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Ferromagnetic materials

Paramagnetic materials

Semi conductors

Diamagnetic materials

If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of.

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3.40 eV

10.20 eV

13.6 eV

3.8 eV

Binding energy per nucleus for uranium is above:

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6.7 Mev

7.7 Mev

6.9 MeV

7.9 MeV

The first laser was built by

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ArthursSchawalow

T.H.Maiman

Peter Sorokin

C.H.Townes

Binding energy for deuteron nucleus is given by

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2.8 MeV

2.23 MeV

2.28 MeV

2.25 MeV

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

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