GATE Electrical 2014 Set 1 | Question: 25

Question

Figure shows four electronic switches $(i), (ii), (iii)$ and $(iv)$. Which of the switches can block voltages of either polarity $($applied between terminals $a$ and $b)$ when the active device is in the $OFF$ state?

• A. $(i), (ii)$ and $(iii)$
• B. $(ii), (iii)$ and $(iv)$
• C. $(ii)$ and $(iii)$
• D. $(i)$ and $(iv)$