Physics Quiz for Schools on “Charging by Induction”.
1. A charge is being induced to a sphere with the help of another charged sphere. The extent of induction increase if ____________
a) The distance between the sphere increases
b) The distance between the sphere decreases
c) The two spheres are kept in contact with each other
d) Remains same irrespective of the distance between the spheres
Answer: d
Clarification: The extent of induction increases if both the spheres are kept close to each other because the more electrons in the uncharged sphere are attracted or repelled by the charged sphere, so the extent of induction increases.
2. During induction, earthing of the body is done for faster induction.
a) True
b) False
3. If a positively charged sphere is taken close to another uncharged sphere then which of the following statements is true?
a) Induction and attraction occur simultaneously
b) Induction occurs before the attraction
c) Attraction occurs before induction
d) Attraction or repulsion may occur
Answer: b
Clarification: If two bodies are taken close to each other, a positively charged body induces a negative charge on another body and then they attract each other. So, induction occurs before attraction. This phenomenon is also true for magnetic induction.
4. Induction occurs due to ______
a) Movement of electron
b) Leakage of charge
c) Ionization of atoms
d) Uniform charge distribution
Answer: a
Clarification: When a positive or negative charged body comes close to another body, the electrons of the second body redistribute themselves. Electrons of the second body are attracted by the positively charged body and repelled by the negatively charged body.