Two concentric thin metallic spheres of radii R1 and R2 (R1 > R2) bear charges Q1 and Q2 respectively. Then the potential at radius r between R1 and R2 will be 1/(4πε0) times:
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The calculation assumes the potential due to a charge on a conducting sphere at an external point is the same as that of a point charge at its center, and the potential inside a conducting sphere is constant and equal to the potential on its surface.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrostatics
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
Practise Electrostatics
833 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrostatics questions
An electric charge 10-3 µC is placed at origin (0, 0). Two points A and B are situated at (√2, √2) and (2, 0) respectively. The potential difference between points A and B will be:
An insulated conductor initially free from charge is charged by repeated contacts with a plate which after each contact is replenished to a charge Q. If q is the charge on the conductor after first operation then the maximum charge which can be given to the conductor is:
In the given circuit, the resistance R has a value that depends on the current. Specifically, R is 20 ohms when I is zero, and the increase in resistance (in ohms) is numerically equal to one-half of the current in amperes. What is the value of current I in the circuit?
The charge flowing across the cell on closing the switch is equal to:
Two charges 1C and -4C exist in air. What is the direction of force?
A point charges 2nC is located at orgin . What is the potential at (1, 0, 0)?