# Answer to Question #42031 in Electromagnetism for Garvi valiramani

Question #42031

1. Why electric field lines are normal to a conductor?

2.why test charge can't be negative?

3. Define discrete charge.

4.can charge be discontinuous?

5.two identical particles each of mass M & charge Q are placed some distance apart.If they are in equilibrium under mutual gravitational &electric force then calculate the order of signature of charge Q/M in SI system.

2.why test charge can't be negative?

3. Define discrete charge.

4.can charge be discontinuous?

5.two identical particles each of mass M & charge Q are placed some distance apart.If they are in equilibrium under mutual gravitational &electric force then calculate the order of signature of charge Q/M in SI system.

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