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A voltage $1000 \sin\omega t\:\: \text{Volts}$ is applied across $YZ.$ Assuming ideal diodes, the voltage measured across $WX$ in $\text{Volts},$ is

1. $\sin \omega t$
2. $(\sin \omega t \:+ \mid \sin \omega t \mid)/2$
3. $(\sin \omega t \: - \mid \sin \omega t \mid)/2$
4. $0$ for all $t$

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