What is resistance and potential difference??
Answers
Answer:
resistance the extraction of a to the flow of current is called resistance and the potential difference maybe the adonis sorry
Resistance is the property of a material or substance which opposes the flow of electric current.
The main cause of resistance is the collision between the charges and atoms
More is the collision , greater will the resistance
Resistance of a material depends on the following factors :
1 => Area of Cross - section
2=> Length of a conductor
3=> Nature of material
4=> Temperature
It is calculated as R = V / I , where V = voltage or potential difference across the conductor and I = current flowing in the circuit
Its Si unit is Ohm
potential - Diffrence
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It is defined as the amount of work done on a test or unit charge bringing it from one location to another location.
it is denoted by V and its si unit is Volt.
potential difference is also known as voltage
it is calculated as V = W / q , where W = work done on a test charge and q = test charge.
it can be also calculated as V = I × R