Question # 1

In a parallel resonant circuit, at resonance

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Current is maximum

Voltage is maximum

Impedance is minimum

Impedance is zero

Which is not the strongest and the most familiar type of magnetism.

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Diamagnetism

Para magnetism

Ferromagnetism

All of these

In a purely inductive circuit, the current

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Lags behind the emf by 90^o

Leads the emf by 90 ^o

Is in phase with emf

May lag or lead the emf

The electric supply line in houses works at 220 V what will be the amplitude of emf.

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120 V

331 V

220 V

440 V

The source of magnetic field are

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Isolated magnetic poles

Electric charge distributions

Current loops

Solenoids

Electrostatic force as compared to gravitational force is

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Zero

infinite

Very weak

Very strong

What is the power factors of wattles current.

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Infinity

Unity

0.5

Zero

What is the value of earth's magnetics fields.

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5 G

50 G

100 G

500 G

Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.

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Zero

F/2

F

2 F

Which one of the following solids exhibits only shot range order.

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Amorphous solids

Polymeric solids

Crystalline solids

Metals

Thermocouple is combination of.

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Thermocouples

Capacitors in parallel

Resistors in series

Ammeter and voltmeter

The core of a transfer is made of iron because

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Iron is a good electric material

Iron is cheaper than copper

Iron is easily magnetized and demagnetized

Iron makes a good permanent magnet

The building up of electric charge on the surface of objects is termed as.

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Static electricity

Electric charge

Electric current

Electrostatic induction

Which material has the greatest di electric constant.

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Mylar

Glass

Germanium

Water

Which physical law expresses the relationship between the heat generated and the current through a conductor.

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Ohm's law

Kirchoff's law

Joule's law

Ampere's law

The doped semi conductor materials are called

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Pure semi conductors

Poor semi conductors

Super conductors

Extrinsic semiconductors

An electric current in conductors is due to the flow of.

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Positive ion

Negative ion

Positive charges

Free electrons

Select the one that is not a donar

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P

AS

Sb

In

When current in an inductor is increasing

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energy is lost

Energy is being stored in the magnetic field of the inductor

Energy is being drained from the magnetic field of the inductor

Eddy current is produced

A radio tuning capacitor is.

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Cylindrical capacitor

Spherical capacitor

parallel plates capacitor

Cylindrical condenser

Thermocouple is used for

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Converting atomic energy into heat energy

Measure the radiant energy

Storing the heat energy

Measuring current

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