Refer to the circuit diagram given in the figure. which of the following observations are correct? A. Total resistance of circuit is $6 \Omega$ B. Current in Ammeter is 1 A C. Potential across $A B$ is 4 Volts. D. Potential across CD is 4 Volts E. Total resistance of the circuit is $8 \Omega$. Choose the correct answer from the options given below:

• Correct answer
  A

  A, B and D Only
• B

  A, B and C Only
• C

  A, C and D Only
• D

  B, C and E Only

Solution

Current through ammeter $=1 \mathrm{~A}$ $\mathrm{R}_{\mathrm{net}}=6 \Omega$
$\begin{aligned} & \mathrm{V}_{\mathrm{AB}}=0.5 \times 4=2 \mathrm{volt} \\ & \mathrm{~V}_{\mathrm{CD}}=1 \times 4=4 \mathrm{volt} \end{aligned}$ A, B & D are correct

Hence, the correct answer is option: 'A'.