MCQ
Electron volt $(ev)$ is the unit of:
- ✓Energy.
- BPotential.
- CCurrent.
- DCharge.
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(Given : Planck's constant $(h) = 6.63 \times 10^{-34}\, Js$, electron charge $e = 1.6 \times 10^{-19}\, C$)

Assertion $A:$ Alloys such as constantan and manganin are used in making standard resistance coils.
Reason $R:$ Constantan and manganin have very small value of temperature coefficient of resistance.In the light of the above statements, choose the correct answer from the options given below.
