Please answer this question ASAP...
Here, reading in voltmeter (V) = 2V
And reading in ammeter (I) = 0.4 A
We know that,
R = V/I
R = 2/0.4
R = 5 Ω
The law applicable here is the Ohm’s law.
Ohm’s law states that the current flowing through a conductor is directly proportional to the potential difference across the conductor. The proportionality constant is the resistance of the conductor, it is a constant for a known temperature range.
The graph obtained is a straight line with positive slope.