Charging by Induction
Trending Questions
- Zero
- Less than in copper
- Equal to that in copper
- Greater than in copper
An electroscope is given a positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the foils separate even further because, ___.
the object is negatively charged
the object is positively charged
- None of the above
the object is electrically neutral
Two identical metal spheres P and Q are supported on insulating stands and placed in contact. What kind of charges will P and Q develop when a negatively charged ebonite rod is brought near P?
P will have a positive charge and Q will have a negative charge
P will have a negative charge and Q will have a positive charge
Both p and Q will have positive charge
Both p and Q will have negative charge
A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology in which toner particles are positively charged and then transfer them onto paper in the form of an image/letters.
What charge should the paper possess for this process to happen?
Only Neutral
Only Negative
both b and c
Only Positive
- Greater than in copper
- Equal to that in copper
- Zero
- Less than in copper
- Negative
- Positive
- Neutral
- Cannot say

- at surface 1, charge induced is −q but uniformly distributed.
- At surface 2, charge is −q and non uniformly distributed.
- at surface 2, charge induced is +q but charge is non uniformly distributed.
- At surface 1, charge is −q but non uniformly distributed.

- at surface 1, charge induced is −q but uniformly distributed.
- At surface 2, charge is −q and non uniformly distributed.
- at surface 2, charge induced is +q but charge is non uniformly distributed.
- At surface 1, charge is −q but non uniformly distributed.
There identical metal plates with large surface areas are kept parallel to each other as shown in figure (30-E8). The leftmost plate is given a charge Q, the rightmost a charge -2 Q and the middle one remains neutral. Find the charge appearing on the outer surface of the rightmost plate.
- Removing some electrons from it
- Giving excess of electrons to it
- Giving some protons to it
- Removing some neutrons from it