A) when pointer moves in one way when voltage is applied and doesn't move when reversed and there is light emission, the item is LED
B) when pointer moves in one way when voltage is applied and doesn't move when reversed and there is no emission of light, the item is a diode
C) when pointer moves in one way when voltage is applied and not when reversed, the item is a resistor
D) none of these
Correct Answer: C
Solution :
For a resistor the pointer moves in both ways when voltage is applied.
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