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  4. In the circuit given below, V ( f ) is the sinusoidal voltage source, voltage drop V AB ( t ) across the resistance R is

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Q. In the circuit given below, $V ( f )$ is the sinusoidal voltage source, voltage drop $V _{ AB }( t )$ across the resistance $R$ isPhysics Question Image

BITSATBITSAT 2017

Solution:

In positive half cycle one diode is in forward biasing and other is in reverse biasing while in negative half cycle their polarity reverse, and direction of current is opposite through $R$ for positive and negative half cycles so cut put is not rectified.
Since $R_{1}$ and $R_{2}$ are different hence the peak during positive half and negative half of the input signal