Aim: To verify Ohm’s law. V=IR where V is the voltage, I is the current and R is the resistance.

**VERIFICATION
OF OHM’ S LAW**

To verify
Ohm’s law.

A
resistor of 5 ohm, voltmeter (0 to 5 volt), an ammeter (0 to 2A), battery of 5
Volt, a plug key, a rheostat.

V=IR
where V is the voltage, I is the current and R is the resistance.

Connect
the circuit as above. Connect the resistor, ammeter, battery, rheostat &
key in series. Connect the voltmeter parallel to the resistor as shown in gure.

Now by
using a Rheostat x the voltages from 0 in steps of 1 Volt and note down the
corresponding value of current I from the ammeter. Make a table.

Plot
a graph taking I along X- axis and V along

Y-axis.

You
will get a straight line

Draw
a triangle ABC & nd the slope.

Slope
= AB /BC = R, the resistance of the resistor which will be 5 ohms.

Ohm’s
law is veri ed by the above experiment.

Tags : Science laboratory practical experiments , 9th Science : Practical experiments

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9th Science : Practical experiments : Verification of Ohm's law | Science laboratory practical experiments

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