# Electrical Units

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Standard units of electrical measurement used for the expression of voltage, current and power are____________.

Fill in the blank with a suitable answer.

## Units used for measurement of electrical quantities voltage, current and power are Volt, Ampere and Watts.

Solution:

Electric current is the rate of change of charge with respect to time,

i=dq/dt

The electrical unit used for measuring current is called Ampere,

1 Ampere= 1 coulomb/sec

Current — Ampere (A)

Voltage is the energy required to move a unit charge through an element. So, the voltage between two terminals is named A, and B is the energy required to move a test charge between these terminals.

VAB=dW/dq

and the electrical unit used to measure the voltage is Volt.

1 Volt=1joule/coulomb

Electric power is the rate at which an element absorbs energy with respect to time.

P=dW/dt=dW/dq×dq/dt=V×I

And unit used to measure power is Watt.

And some standard electrical units are mentioned below,

 Electrical parameter Unit used for measuring equation Charge Coulomb (C) Current Ampere (A) i=dq/dt Voltage Volt (V) V=dW/dt Power Watts (W) P=V.I resistance Ohm R=V/I Conductance Siemen (S) G=I/V Inductance Henry (H) v=L.(di/dt) Capacitor Farad (F) C=q/v Impedance Ohm Z=√R2+X2 Frequency Hertz (Hz) f=1/T

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