EASY
12th CBSE
IMPORTANT
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Deduce the dimensional formula for the proportionality constant k in Coulomb's law.

Important Questions on Electric Charges and Field

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 25
Write the dimensional formula for the permittivity constant ε0 of free space.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 26
What is the force of repulsion between two charges of 1 C each, kept 1 m apart in vacuum?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 27

Two point charges 'q1 and 'q2' are placed at a distance 'd' apart as shown in the figure. The electric field intensity is zero at a point P on the line joining them as shown. Write two conclusions that you can draw from this.

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EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 28
Define dielectric constant of a medium in terms of force between electric charges.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 29
In a medium the force of attraction between two point electric charges, distance d apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3 F?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 30
The force between two charges placed in vacuum is F. What happens to the force if the two charges are dipped in kerosene oil of dielectric constant, k=2?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 31
State the superposition principle for electrostatic force on a charge due to a number of charges.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 1 - Electric Charges and Field>Text Based Exercises>Q 32
A force F is acting between two point charges q1 and q2. If a third charge q3 is placed quite close to q2, what happens to the force between q1 and q2?