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Answer 1

Ohm's Law.

At a constant temperature the potential difference between two end points of a conductor is directly proportional to the current supplying through the conductor.

V = IR (R is a conductor of variations).

Experimental verification:-

In order to verify Ohm's Law we prepare an electric circuit. Ammeter is added in series and voltmeter in parallel. Then we supply current through the conductor and take reading of Ammeter and Voltmeter. Further, we find the value of I. We repeat this experiment five times supplying different amount of current and note the value of I. We observed that value of I/V always remains same in different experiments. If we draw a graph between I and V we get a straight line. This proves that Current is directly proportional to the Potential difference.

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Answer 2

$\huge\star{\pink{\underline{\mathfrak{Answer}}}}$

✨It deals with the relationship between voltage and current in an ideal conductor.

✨This relationship states that the potential difference across the ends of the given metallic conductor in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same.

✨This is called the OHM'S LAW.

✨According to the ohm's law,

➡V∝I

➡V=IR,

where 'V' is the potential difference in 'volts','I' is the current in 'ampere' and 'R' is the constant of proportionality I.e. the resistance in ohm.

EXPERIMENTAL VERIFICATION:-

Aim:-To verify Ohm's law.

Materials required:-Connecting wires,battery,switch,rheostat,voltmeter and ammeter.

Procedure:-

(1)Set the Rheostat so that a small amount of current passes through the circuit,and turn on the switch.

(2)Read the reading in the ammeter and voltmeter.Note it down.

(3)The current in the circuit is now increased step by step by changing the position of sliding contact C of the Rheostat.

(4)Note the reading of ammeter and voltmeter at every step when the current is increased.

(5)Calculate the ratio of potential difference by current for all the readings.

Observation:-The ratio potential difference by current of all the readings will have a constant value if the experiment is done correctly.

Conclusion:-Since the ratio of potential difference and current is constant Ohm's law gets verified because the shows that the current is directly proportional to potential difference.

✨The constant ratio of potential difference by current gives us the resistance R of the conductor.

✨So, this Ohm's law experiment can also be used to determine the resistance of a conductor.

✨If a graph is drawn between the potential difference readings and corresponding current readings, we will get a straight line graph showing the current is directly proportional to potential difference.

✨This also Verify Ohm's law.

Note:- Check out the photos attached.