Question # 1

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

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Eye

Heart

Brain

Lungs

Total flux through a closed surface depends on.

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Shape of surface

Medium only

Charge enclosed only

Charge and Medium

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

If F1 and F2 are teh magnetic forces acting on a particle and electron respectively when moving perpendicular to the magnetic field then.

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F1=F2

F1>F2

F1<F2

F1 = 4F2

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

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

The electrical intensity is equal to:

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-Δr/Δv

Δv/Δr

Δv/Δv

-Δv/Δr

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

The total flux through a closed surface.

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Directly proportional to shape and geometry

Independent of medium

Depend on shape and geometry

Dependent on medium and the charge enclosed

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

The electrostatic force between two charges is 42 N, If we place a dielectric of E_y=2.1 between the charges then the force become equal to.

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42 N

88.2 N

20 N

2 N

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

Some charge is being given to a conductor. Then its potencial

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Its maximum at surface

Its maximum at Its maximum at center

Is remain same throughout the conductor

Is maximum somewhere between surface and centre

A capacitor stores energy in the form of.

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Magnetic field

Heat energy

Electrical energy

Mechanical energy

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