State Ohm's law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.

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Solution

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same.
The experimental set up is shown below:

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Q. Draw the circuit diagram of an electric circuit containing a battery of 6 V, a key, an ammeter, a resistor of 4 Ω in series with a combination of two resistors of 8 Ω each in parallel, and a voltmeter across the parallel combination.
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The diagram in the figure shows a cell of e.m.f. $ε = 2$ volt and internal resistance r = 1 ohm connected to an external resistance R = 4 ohm. The ammeter A measures the current in the circuit and the voltmeter V measures the terminal voltage across the cell. What will be the readings of the ammeter and voltmeter when (i) the key K is open, and (ii) the key K is closed?

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Ohm's Law

Standard X Physics

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State Ohm's law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same. The experimental set up is shown below:

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same.
The experimental set up is shown below: