Which of the following is not true?
A. A transformer is usually employed in order to step-down the supply voltage.
B. A transformer is usually employed to protect from shocks.
C. When the sinusoidal input voltage goes positive, the diode is forward-biased in a half wave rectifier.
D. For an ideal diode, forward resistance rf=100%.
E. None of the above.
Answer (1)
The statement that is not true is (b), as transformers are not primarily used for shock protection. Instead, their main function is to step up or step down voltage levels. Additionally, statement (d) is also false because an ideal diode has zero forward resistance. ;
