Define the terms: Electric current electric circuit lii) unit of current(lv) Voltmeter (v) potential difference
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CIRCUIT
An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.
UNIT OF CURRENT
The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×10−19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆νCs
VOLTMETER
A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.
POTENTIAL DIFFERENCE
the difference in potential between two points that represents the work involved or the energy released in the transfer of a unit quantity of electricity from one point to the other.