Question

calculate the potential difference required across a conductor of resistance 5 ohm to flow a current of 1.5 A through it? ​

Answer 1

Explanation:

GIVEN:

R=5Ohm

I=1.5A

V=?

FROM OHM LAW

V=IR=1 .5×5=7.5V

Answer 2

Given :

• The resistance of the conductor (R) = 5 Ω
• The current flowing through conductor (I) = 1.5 A

To find :

⇢ Potential difference across the conductor

Solution :

By Ohm's law

$\boxed{\tt{\large{ V =IR}}}$

$\begin{cases} \text{I} & = 1.5\: \text{A} \\ \\ \text{R} &= 5 {\Omega} \end{cases}$

⇢ V = 1.5 × 5

⇢ V = 7.5 V

$\underline{\rm{\therefore The\ potential\ difference\ across\ the}} \\ \underline{\rm conductor\ is\ 7.5 volts}$

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• Ohm's law states that potential difference across a conductor is directly proportional to the current applied and the ratio of potential difference to current is always a constant called resistance .

• SI unit of Potential difference is V .

• When the circuit is open , the potential difference is called EMF .