Question

Match the items in List-I with items in List-II and choose the correct answer.

\[ \begin{array}{|c|l|c|l|} \hline \text{List-I} & & \text{List-II} & \\ \hline (a) & \text{Solar cell} & (i) & \text{Perfect diamagnet} \\ \hline (b) & \text{LED} & (ii) & \text{Voltage-controlled Voltage Source (VCVS)} \\ \hline (c) & \text{Op-amp} & (iii) & \text{Photovoltaic device} \\ \hline (d) & \text{Superconductor} & (iv) & \text{p-n junction diode} \\ \hline \end{array} \]

• A. a – iv, b – i, c – ii, d – iii
• B. a – iii, b – iv, c – ii, d – i
• C. a – ii, b – iv, c – i, d – iii
• D. a – iii, b – i, c – ii, d – iv

Hint:

Solar Cell $\rightarrow$ Photovoltaic Device LED $\rightarrow$ p-n Junction Diode Op-Amp $\rightarrow$ VCVS Superconductor $\rightarrow$ Perfect Diamagnet

Answer 1

The Correct Option is B

Step 1: Match Solar Cell.
A solar cell converts sunlight into electrical energy. \[ a \rightarrow iii \]

Step 2: Match LED.
LED is a light-emitting p-n junction diode. \[ b \rightarrow iv \]

Step 3: Match Op-Amp.
An operational amplifier behaves as a voltage-controlled voltage source. \[ c \rightarrow ii \]

Step 4: Match Superconductor.
A superconductor exhibits perfect diamagnetism (Meissner effect). \[ d \rightarrow i \] Thus, \[ a-iii,\quad b-iv,\quad c-ii,\quad d-i \] \[ {\text{Option (B)}} \]