Question

Current through $3\, \Omega$ resistor is 0.8 ampere, then potential drop through $4\, \Omega$ resistor is

• A. 9.6 V
• B. 2.6 V
• C. 4.8 V
• D. 1.2 V

Answer 1

Answer: (C)

4.8 V

Answer 2

Current across $3\, \Omega = 0.8\, A$
$6\, \Omega$ is in parallel, current across $6\, \Omega = 0.4\, A$
Total current = 1.2 A
$\therefore$ potential difference across $4\, \Omega$ resistor $=1.2\, A \times 4\, \Omega$
$= 4.8\, V.$