The working of all electrical instruments depends upon
* Magnetic
* Chemical * Electromagnetic
effect of current.
* Electrostatic
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Answer Effect of current
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None of the options are correct. Different electrical devices depend on different characteristics of electricity.
- Ammeters, Voltmeters, energy meters, and power meters are dependent upon magnetic effects of current and are suitable for both AC and DC.
- Some Ammeters and Voltmeters work on the effect of chemical and thermal effect and some work on dynamo effect and induction effect of electromagnetic current.
- Therefore, all electrical instruments depend upon different effects of electric current.
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