Question

Two resistors of resistor 2$\Omega$ and 5$\Omega$ are connected in series with a 7V battery. Find the potential difference across the 5$\Omega$​ resistor.

• A. 2 V
• B. 7 V
• C. 5 V
• D. 1 V

Answer 1

The correct option is C

5 V

Total resistance in circuit = 2 + 5 = 7$\Omega$ (series connection)
Using ohm's law to find net current,
V = IR
7 = I $\times$ 7
I = 1A
Potential drop across 5$\Omega$ resistor
$\Rightarrow$ V = IR
V = 1 $\times$ 5
V = 5 V