Differentiate between electromotive force and potential difference .
Answers
Answer:
Basis For Comparison Electromotive Force
Definition It is the amount of energy supply to one coulomb of charge.
Potential Difference
the amount of energy used by one coulomb of charge in moving from one point to another.
Unit E -Volt p-Volt
Symbol E-ε p-V
Source E-dynamo or p- Battery Battery
Resistance Independent from the resistance of the circuit Proportional to the resistance of the circuit.
Current It transmits current throughout the circuit. It transmits current between any two points.
Magnitude Greater than the potential difference between any two points Always less than the maximum value of emf when the
battery is fully charged.
Variation It remains constant Does not remain constant.
Relation Cause Effect
No current Not Zero Zero
Voltage It is the maximum voltage that the battery can transfer It is less than the maximum voltage that cell can deliver.
Field Causes in magnetic, gravitational and electric field. Induces only in electric field
Energy Gain energy Loss energy
Measuring Instrument EMF Meter Voltmeter