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-VoltSymbol E-ε p-VSource E-dynamo or p- Battery BatteryResistance 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 thebattery is fully charged.Variation It remains constant Does not remain constant.Relation Cause EffectNo current Not ZERO ZeroVoltage 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 fieldEnergy Gain energy Loss energyMeasuring Instrument EMF Meter Voltmeter