Q. E.m.f. of a Weston cell is accurately measured by (Solved)
1. electrostatic voltmeter
2. hot wire voltmeter
3. isothermal voltmeter
4. electrodynamic voltmeter
- a. electrostatic voltmeter
1. electrostatic voltmeter
2. hot wire voltmeter
3. isothermal voltmeter
4. electrodynamic voltmeter