Question

Write the materials required to conduct ohm's law verification experimentally.​

Answer 1

Answer:

"Material required : A resistor of about 5 Ω, an ammeter ( 0 - 3 A), a voltmeter (0 - 10 V), four dry cells of 1.5 V each with a cell holder (or a battery eliminator), a plug key, connecting wires, and a piece of sand paper. Precautions : All the electrical connections must be neat and tight.

Explanation:

To verify Ohm's law, we need to measure voltage across the test resistance RT and current passing through it. The voltage can be measured by connecting high resistance R1 in series with galvanometer. This combination becomes a voltmeter and shall be connected in parallel to RT ."

Answer 2

Material required : A resistor of about 5 Ω, an ammeter ( 0 - 3 A), a voltmeter (0 - 10 V), four dry cells of 1.5 V each with a cell holder (or a battery eliminator), a plug key, connecting wires, and a piece of sand paper. Precautions : All the electrical connections must be neat and tight

Verifying Ohm's Law - example

Make a circuit of R, voltmeter and ammeter measuring voltage and current through R, rheostat (variable resistor), and a cell. Connect the components properly. Note down values of voltage and current shown by voltmeter and ammeter. Repeat the above for different values of Rheostat