Question # 1

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

The current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

When platinum wire is heated, it changes to cherry red at temperature.

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500^oC

900^oC

1100^oC

1300^oC

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

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Baryons

Leptons

Mesons

Quarks

Which one of the following is ductile substance.

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Copper

Lead

Wrought iron

All of them

The critical temperature of mercury is.

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1.18 K

4.2 K

3.72 K

7.2 K

Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

Electrons are

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Hadrons

Laptons

Quarks

Baryons

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

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

Electric current produces magnetic field, was suggested by.

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Faraday

Oersted

Henry

Lenz

Energy band theory is based upon

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Hund's Rule

Heisenberg uncertainty principle

Bohr's atomic Model

Wave mechanical model

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

The shortest wave length is Bracket series has wave length.

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16/Rn

Rn/16

16 Rn

4 Rn

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