Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 39

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Two point charges $(+ Q)$ and $(- 2 Q)$ are fixed on the $X$ -axis at positions $a$ and $2 a$ from origin, respectively. At what positions on the axis, the resultant electric field is zero?

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Important Questions on Electrostatics

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JEE Advanced

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 40

Two point charges

q

and

2 q

are placed some distance apart. If the electric field at the location of

q

be

E

, then that at the location of

2 q

will be

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 41

Infinite charges of magnitude

q

each are lying at

x = 1, 2, 4, 8, \dots

metre

on

X

-axis. The value of intensity of electric field at point

x = 0

due to these charges will be

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 42

Angle between equipotential surface and lines of force is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 43

If a charged spherical conductor of radius

10 cm

has potential

V

at a point distance

5 cm

from its centre, then the potential at a point distance

15 cm

from the centre will be

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 44

Two unlike charges of magnitude

q

are separated by a distance

2 d .

The potential at a point midway between them is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 45

Two spheres

A

and

B

of radius

a

and

b

respectively, are at same electric potential. The ratio of the surface charge densities of

A

and

B

is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 46

Point charge

q_{1} = 2 μC

and

q_{2} = - 1 μC

are kept at points

x = 0 m

and

x = 6 m

, respectively. Electrical potential will be zero at points

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 1 - Electrostatics>Objective Problems [ Level1 ]>Q 47

Eight small drops, each of radius

r

and having same charge

q

are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is