Question

aim: to study the dependence of electric current (I) and the potential difference (V) across a resister and determine resistance. (Draw a circuit diagram)

NO SPAM! ​

Answer 1

Answer:

To study the dependence of current on the potential difference with graph

Aim

To study the dependence of current (I) on the potential difference (V) across a resistor and determine its resistance. Also plot a graph between V and I.

Materials Required

Battery eliminator

Ammeter

Voltmeter

Rheostat

One way plug key

Resistor

Connecting wires

Theory

Ohm’s Law:

At constant temperature, the potential difference (V) across a conductor is directly proportional to the current (I) flowing through it.

Mathematically,

V ∝ I

or V = IR

or R = V/I

Where, R is constant of proportionality and is known as resistance.

Factors affecting resistance:

Length of the conductor (R ∝ l)

Cross-section area of the conductor (R ∝ 1/A)

Nature of the material