Question # 1

If the distance between two charges is halved and charges are also doubled, then force between them will be.

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Two time

Four time

Eight time

Sixteen time

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

If the separation between the plates of a capacitor is doubled then its capacitance become.

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Double

Half

One fourth

Three times

A capacitor stores energy in the form of.

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Magnetic field

Heat energy

Electrical energy

Mechanical energy

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

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

The electrical intensity is equal to:

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-Δr/Δv

Δv/Δr

Δv/Δv

-Δv/Δr

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

SI unit of electric flux is.

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NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

In Millikan's oil drop experiment a charged particle of mass 'm' is in equilibrium in an will

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Zero

g/2

g

2g

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

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

The middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

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

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Eye

Heart

Brain

Lungs

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

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

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