EASY
12th Karnataka Board
IMPORTANT
Earn 100

Explain law of conservation of charge.

Important Questions on Electric Charges and Fields

EASY
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 21
An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
EASY
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 22

Figure shows the electric field lines around three point charges A, B and C. Which charges are positive?

Question Image

MEDIUM
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 23
The identical point charges, q each, are kept 2 m apart in air. A third point charge Q of unknown magnitude and sign is placed on the line joining the charges such that the system remains in equilibrium. Find the position and nature of Q.
MEDIUM
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 24
Two particles A and B having charges 8×10-6 coulomb and -2×10-6 coulomb respectively are held fixed with separation of 20 cm. Where should a third charged particle be placed so that it does not experience any electric force?
HARD
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 25
Define electric flux and electric flux density. What is meant by negative flux? Explain with diagram. Write SI unit and dimensions of electric flux.
EASY
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 26
Write the law of superposition for forces ?
MEDIUM
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 27
At each of the four corners of a square of side a, A charge +q is placed freely. What charge should be placed at the centre of the square so that the whole system be in equilibrium?
MEDIUM
12th Karnataka Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 28
What is the value of electric field at the centre of a uniformly charged non-conducting sphere?