Question # 1

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

Capacitance of a capacitor does not depend upon.

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Distance between plates

Area of plates

Electric field between plates

Medium between plates

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

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

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

SI unit of electric flux is.

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NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

The electric intensity at infinite distance from the point charge is

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Infinite

Zero

Positive

Negative

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

The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (ρ) , in this region of space?

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ρ = 0

ρ decreases linearly in the direction of the electric field

ρ increases linearly in the direction of the electric field

ρ has a uniform value throughout the region

Gauss's law can only be applied to.

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A curved surface

A flat surface

A closed surface

A surface of any shape

Which one of the following is correct

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All of above

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

A force of 0.01 N is exerted on a charge 1.2 x 10^-5 C at a certain point. The electric field at that point is

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1.2 x 10⁴ N/C

1.2 x 10⁴ C/N

8.3 x 10² N/C

8.3 x 10^-2 N/C

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