Question # 1

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

Electro encephalon graph is the diagnostic test for the working of.

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Eye

Heart

Brain

Lungs

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

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

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

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

The capacitance of a capacitor depends upon.

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Thickness of plates

Charges on the plates

Voltage applied

Geometry of the capacitor

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

The force of Neutron due to field of 10² N/C is.

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1.6 x 10^-17N

1.6 x 10^-19N

Zero

1.6 x 10^-21N

The middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

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

Photo copier and inkjet printer are the applications of

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Magnetism

Electricity

`.Electro magnetism

Electrostatics

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

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Physics ICS Part 2 Chapter 12 Online MCQ's Test MCQs With Answers

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