Question # 1

As the current flows through the wire

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It generates heat in the wire

It produces sound in the wire

Resistance of the wire decrease

Voltage across the ends is the increase

None of these

The magnitude of chemical Effects depends upon:

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Nature of liquid

Quantity of Electricity passed through the liquid

Color of the liquid

Both (A) and (C)

Both (A) and (B)

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

When certain area A is held parallel to the field lines, then:

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No lines cross this area

Maximum lines pass through this area

The number of lines are between zero and maximum

Both (A) and (B) correct

None of these

Another mean of electric potential energy per unit charge is given by:

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Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

Electrolysis is the study of conduction of electricity through:

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Solids

Liquids

Gases

Plasma

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

An eV is unit of:

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Potential

Energy

Work

Power

Both (B) and(C)

Two dissimilar metals joined at their ends kept at constant temperature constitute:

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Cell

Voltmeter

Thermocouple

Potentiometer

None of these

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

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One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these

Gaussian surface is always:

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Rectangular

Spherical

Cylindrical

Box shape

Any of these

Selenium is:

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An insulator

A conductor

Insulator in the dark and becomes conductor when exposed to light

Conductor in the dark only

None of these

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

Magnetic effect of current is used:

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In electric motor

To detect current

To measure current

All of these

None of these

The free electrons in metals:

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Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

Tick the correct statement:

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Both the potential and potential difference is scalars

Potential is a scalar but potential difference is a vector

Both are vectors

Potential is vector but potential difference is scalar

None of these

The number of field lines passing through unit area held perpendicular to the field lines represent:

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Flux in that region

Intensity of the field

Charge

Area of the region

None of these

Field lines are closer to each other in the region where the field is:

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Stronger

Weaker

Much weaker

Absent

None of these

The best conductor is:

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Silver

Copper

Aluminimum

Both B and C

None of them

An inkjet printer uses in its operation:

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Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

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Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

SI unit of current describes the flow of charge at the rate of

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One ampere per second

One coulomb per second

One electron per second

6.25 x 10¹⁸electrons per second

Both B and D

The inkjet printer ejects a thin stream of:

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Water

Oil

Ink

Any of above

None of these

The surface destiny of charge is defined is:

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Charge per volume

Mass per volume

Charge per area

Mass per area

Both (B) and (C)

Aluminum is a:

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Good insulator

Bad conductor

Both (A) and (B)

Excellent conductor

Semiconductor

Electrostatics is the branch of physics which deals with the study of electro charges:

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At rest

At rest under the action of electric forces

In motion under the action of electric forces

In motion

At rest under the action of nuclear forces

A thermistor is a resistor which is:

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Light Sensitive

Heat Sensitive

Sound Sensitive

All of these

None of these

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

Electric field lines emerge from the charge in:

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One dimension

Two dimensions

Three dimensions

Four dimensions

None of them

A rheostat can e used:

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As variable resistor

As potential divider

For varying the current

All of these

None of these

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ECAT Pre General Science Physics Chapter 13 Current Electricity Online Test MCQs With Answers

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