Question # 1

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 resistance is used to convert a Galvanometer into an ammeter.

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High resistance

Low resistance in series with galvanometer

Shunt

High resistance in series with galvanometer

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

In case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

Electrons are

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Hadrons

Laptons

Quarks

Baryons

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

Electric current produces magnetic field, was suggested by.

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Faraday

Oersted

Henry

Lenz

The AC system is preferred to DC system because:

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AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

The electrons in one coulomb change is equal to.

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1.6 x 10^-19

2.25 x 10^-19

6.25 x 10^-18

6.25 x 10^-19

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

The winding of the electromagnet in motor are usually called.

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Magnetic coils

Field coils

Electric coils

electric o electric coils

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

The Kirchhoff 1^st rule is manifestation of:

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Law of conservation of mass

Law of Conservation of charge

Law of conservation of energy

None of above

In an electronic transition atom cannot emit.

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Infrared radiations

Visible radiations

Ultraviolet radiations

Gama radiations

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

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