Question # 1

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

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

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 middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

Total flux through a closed surface depends on.

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Shape of surface

Medium only

Charge enclosed only

Charge and Medium

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

The absolute electric potential at a point distance 20 cm from a charge of 2 uC is.

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9 x 10² V

9 x 10³ V

9 x 10⁴ V

9 x 10 ⁵ V

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

An ECG records the _____ between points on human skin generated by electric process i the heart.

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Heart beat

Pulse rate

Pressure

Voltage

Which one is photo conductor.

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Copper

Selenium

Mercury

Aluminium

Electric field intensity at a point is defined by the relation.

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E= q/F

E = F/q

E = qF

E = F/q2

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