What is the net flux of a uniform electric field E → = 3 × 10 i ^ N C - 1 through a cube of side 20 cm oriented such that its faces are parallel to the coordinate planes?

The net flux through the cube is zero as electric flux entering the cube will be equal to the electric flux leaving the cube and no charge is enclosed by the cube. It is to note that the total electric flux through a closed surface due to uniform electric field is zero.

E M B I B E

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 3>Q 3

HARD

NEET

IMPORTANT

Earn 100

Two charges of value $2 μC$ and $- 50 μC$ are placed $80 cm$ apart. Calculate the distance of the point from the $2 μC$ charge where the electric field intensity is zero.

Important Questions on Electrostatics

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 3>Q 4

A charged particle of mass

2 m g

remains freely in air in an electric field of strength

4 N C^{- 1}

directed upward. Calculate the charge and determine its nature

(g = 10 m s^{- 2})

.

EASY

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 3>Q 5

How many electrons should be added or removed from a neutral body of mass

10 mg

so that it may remain stationary in air in an electric field of strength

100 N C^{- 1}

directed upwards

(g = 10 m s^{- 2})

?

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 3>Q 6

Work out the magnitude and direction of field at point

P

, when a charge of

2 μ C

experiences an electrical force of

5 \times 10^{- 2} \hat{j} N

at point

P

.

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 4>Q 1

Two charges

4 µ C and 36 µ C

are placed

60 cm

apart. At what distance from the larger charge is the electric field intensity is zero?

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 4>Q 2

Three charges of respective values $- \sqrt{2} μ C, 2 \sqrt{2} μ C$ and $- \sqrt{2} μ C$ are arranged along a straight line as shown in the figure. Calculate the total electric field intensity due to all three charges at the point $P$ .

Question Image

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 4>Q 3

Two-point charges

Q

&

4 Q

are

12 cm

apart. Sketch the lines of force and calculate the distance of a neutral point from

4 Q

the charge.

EASY

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>BEGINNER'S BOX - 4>Q 4

A charge

Q

is uniformly distributed over a large plastic (non-conducting) sheet. The electric field at a point close to the centre of the plate near the surface is