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Question

In the below given arrangement determine the ammeter reading, if each diodes have a forward resistance of 50Ω and infinite backward resistance-
1371092_6d71db37e4a84e6d83c1c1869ae62d05.PNG

A
zero
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B
0.02
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C
0.03
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D
0.036
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Solution

The correct option is C 0.02
The diode, that is connected with the 50Ω resistor is in negative bias. So, no current will be passing through that portion.
Now, if we think of an equivalent circuit, we can see that three resistors, i.e., 50Ω, 150Ω and 100Ω are connected in series with a 6 V source.
Therefore, the reading of the ammeter is 6 V(50+150+100)Ω=6300A=0.02A


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