Question

a current of 5a is flowing through a resistor of 15 ohm. calculate the potential difference of the ends of the resistor.

Answer 1

According to ohm's law
V= IR
Therefore,
V=5×15= 75V

Answer 2

Answer:

The value of potential difference across the ends of the resistor is equal to 75V.

Explanation:

Given : the current flowing trough a resistor, $I=5A$

The value of the resistance, $R=15ohm$

If V is the potential difference across the ends of resistor,

According to the Ohm's law, the current flowing through the conductor is directly proportional to potential difference across the conductor and inversely proportional to its resistance.

Therefore, $I=\frac{V}{R}$

or   $V=IR$                                                     ..................(1)

Put the value of I and R in eq.(1);

⇒   $V=(5A)(15ohm)$

∴    $V=75Volt$

Therefore, the potential difference will be equal to 75V.