Physics
Grade-8
Easy
Question
The electric force ___________ on the medium between the charges.
- Depends
- Doesn’t depend
- Sometimes depend
- Doesn’t act
Hint:
Depends
The correct answer is: Depends
- Electrostatic force (F)= Kq1q2 /r2
- Where, q= charge, r= distance and K= proportionality constant.
- K is constant only for a given medium.
- Therefore, the electric force depends on the medium between the charges.
- So, the correct answer is depends.
- K= 1/4πε
- The value of k depends on the electric permittivity of the medium (ε).
- And the electric permittivity of a medium (ε) depends on the nature of the medium.
- Therefore, the value of K is different for different medium.
- Hence, the electrostatic force depends on the medium between the two charges.
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