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A diode is a device that allows current ...

A diode is a device that allows current to be carried in only one direction (the direction indicated by the arrowhead in its circuit symbol). Find (approximately) in terms of `DeltaV` and R the average power delivered to the diode circuit of the figure. Assume that the diodes are ideal and `DeltaV` is the rms voltage applied to the circuit.

A

`((DeltaV)^(2))/(R ) xx 0.6`

B

`((DeltaV)^(2))/(R ) xx 0.8`

C

`((DeltaV)^(2))/(R ) xx 1.1`

D

`((DeltaV)^(2))/(R ) xx 1.4`

Text Solution

Verified by Experts

The correct Answer is:
B
When the left end is positive, upper diode conducts and lower diode is cut off.
`R_(eq) = R`
When right end is positive the lower diode conducts.
`R_(eq) = R + (3R)/(4) = (7R)/(4)`
`:.` Power `= ((DeltaV)^(2))/(R ) [1 + (4)/(7)] xx (1)/(2) ~~ ((DeltaV)^(2))/(R ) xx 0.8`
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