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It is required to hold equal charges $q$ in equilibrium at the corners of a square. What charge when placed at the center of the square will do this?

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Important Questions on Electric Charges and Fields

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 41

Three identical charges each

2 μ C

lie at the vertices of a right-angled triangle as shown in the figure. Forces on the charge at

B

due to the charges at

A

and

C

respectively are

F_{1}

and

F_{2}

. The angle between their resultant force and

F_{2}

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 42

A point charge

+ Q

is placed at the centroid of an equilateral triangle. When a second charge

+ Q

is placed at a vertex of the triangle, the magnitude of the electrostatic force on the central charge is

4 N

. What is the magnitude of the net force on the central charge when a third charge

+ Q

is placed at another vertex of the triangle?

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 43

Two equal and opposite charges are placed at a certain distance. The force between them is

F

. If

25 %

of one charge is transferred to other, then the force between them is -

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 44

Two point charges

+ 3 μ C

and

+ 8 μ C

repel each other with a force of

40 N

. If a charge of

- 5 μ C

is added to each of them, then the force between them will become -

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 45

If two like charges of magnitude $1 {\times10}^{- 9} coulomb$ and $9 \times 10^{- 9} coulomb$ are separated by a distance of $1 m$ , then the point on the line joining the charges, where the force experienced by a charge placed at that point is zero, is:

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 46

The force of interaction between two charges

q_{1} = 6 μ C

and

q_{2} = 2 μ C

is 12 N. If charge

q = - 2 μ C

is added to each of the charges, then the new force of interaction is

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 47

Two balls, with equal charges, are placed in a vessel with ice, at

- 10 ° C

, at a distance of

25 c m

from each other. On forming water at

0 ° C

, the balls are brought nearer to

5 c m

, for the interaction between them to be same. If the dielectric constant of water, at

0 ° C

, is

80

, the dielectric constant of ice, at

- 10 ° C

, is

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 48

At a point in space, the electric field points towards North. In the region surrounding this point, the rate of change of potential will be zero along

It is required to hold equal charges q in equilibrium at the corners of a square. What charge when placed at the center of the square will do this?

Important Questions on Electric Charges and Fields

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It is required to hold equal charges $q$ in equilibrium at the corners of a square. What charge when placed at the center of the square will do this?