Question # 1

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

The photo copying process is called

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Xerography

Inkjet Printer

Both (a) and (b)

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

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

Two metallic sphere of radius 2 cm and 4 cm get equal quantity of charge. Which has greater surface charge density ?

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2^nd sphere

Both have same

First sphere

None of these

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

Charge on electron is

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1.6 x 10^-19 C

1.6 x 10¹⁹C

1.6 x 10^-17C

1.6 x 10¹⁷C

Which one is photo conductor.

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Copper

Selenium

Mercury

Aluminium

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

Which one of the following is correct

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All of above

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

The work done is bringing a unit positive charge from infinity to that point in an electric field is called.

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Potential

Potential difference

Absolute potential

All of these

The electric flux through closed surface depends upon

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Charge

Medium

Geometry

Charge and Medium

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:

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8 j

16 j

4 x 10^-3j

2 x 10^-3j

An electric field cannot deflect

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X-rays

a-particles

ß-particles

None of these

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

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

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

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