Question # 1

An ammeter can be converted into a voltmeter by connecting a

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Low resistance i series

High resistance in series

High resistance in parallel

Low resistance in parallel

When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the.

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Current direction

Thermocouple used

Temperature gradient

Amount of current

A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then

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Fuse will not blow

Fuse will blow

Supply will spark

Only toaster can work

A preset or trimmer can be a.

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Variable resistor

Variable capacitor

Variable inductor

All of these

On which factor the self induction does not depends upon.

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Number of turns of the coil

the core material

Weight of the coil

Area of the cross section of the coil

The free electron theory explains conduction in

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Insulators only

Metals only

Semi conductor only

Non metals only

A pair of point charges with equal magnitude and opposite sign separated by a distance 'r' produce.

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Electric dipole

Electric charge

Electric field

electric arc

What is used in an electric circuit to allow current in one direction only.

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A fuse

An ammeter

A diode

A relay

If the source of emf is traversed from negative to positive terminal the potential charge.

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Is negative

Is positive

Is zero

Remain the same

The emf induced by the motion of a conductor across a magnetic field is called.

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Absolute potential

Motional emf

Induced emf

Terminal potnetial

The steady current which produces the same heating effect in a resistance in a given time as the alternating current does in the same resistance in the same time is called.

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Induced current

Root mean square value of an alternating current

Mean value of alternating current

Electromotive force

A current carrying loop lying-in a magnetic field behaves lime a.

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Magnetics pole

Magnetic material

Magnetic dipole

Horse shoe magnet

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

A resistor whose resistance decreases with increasing intensity is.

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Light dependent resistor

Thermistor

Thermocouple

Strain gauge

What is the range of values of power factor.

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0 to -1

0 to +1

0 to 2

2 to 3

Since selenium becomes conductor in light so it is.

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Photoconductor

Photocell

Thermistor

Photodiode

In what form is the energy stored in an inductor.

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Magnetic

electrostatic

Magnetic and electrostatic

All of the above

The typical value of forbidden energy gap in germinium is.

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0.7 eV

1.0 eV

1.4 eV

10 eV

The vertical component of earth's magnetics field is zero.

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At magnetic poles

At geographical poles

At magnetic equator

Everywhere

The sum of the positive and negative peak values is known as.

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Peak value

Average value

Instantaneous value

Peak to peak value

Positive electric charge is the type of charge found on a rod which has been rubbed with silk and which is made of.

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rubber

Glass

Steel

Cork

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