Question

Name the physical quantities of which the units are :
(i) volts (ii) coulomb
(iii) ohm (iv) ampere

Answer 1

Answer:

1) volts- potential difference

2) coulomb-charge

3)ohm- resistance

4) ampere- Current

Answer 2

Volt - potential difference

Coulomb - electric charge

Ohm - electrical resistance

Ampere - electric current

Explanation:

(i) Volt is the electrical unit of voltage or potential difference (symbol: V). One Volt is defined as energy consumption of one joule per electric charge of one coulomb.

(ii) The SI unit of electric charge is coulomb (symbol: C). One coulomb is the amount of charge in one ampere-second.

(iii) The SI unit of electrical resistance is Ohm (symbol: Ω). The ohm is the equivalent of a volt per ampere.

(iv) The SI unit of electric current is Ampere (symbol: A).  1 ampere is the constant current that will produce an attractive force of 2 × 10−7 Newton per meter of length between two straight, parallel conductors of infinite length and negligible circular cross section placed one meter apart in a vacuum.