Question

Choose ALL of the true statements of ideal diode.

a. It operates in two modes: on and off.
b. Current flows from anode to cathode.
c. When voltage v across diode is positive (forward-bias), current is zero. If v>0, i=0.
d. When current i across diode is positive (short), voltage is zero. If i>0, v=0.

Answer 1

The true statements are that an ideal diode operates in on/off modes, current flows from anode to cathode, and when conducting, the voltage across it is nearly zero.

Step-by-step explanation:

The true statements about an ideal diode are:

• It operates in two modes: on and off.
• Current flows from anode to cathode.
• When current i across diode is positive (short), voltage is zero. If i>0, v=0.

An ideal diode does indeed operate in two modes: It is either on (allowing current flow) or off (blocking current flow). Current flows from the anode to the cathode when the diode is forward biased, meaning the anode is positive relative to the cathode. The given statement (c) is incorrect because when a diode is forward biased and the voltage across it (v) is positive, the current (i) is not zero; it is allowed to flow. On the other hand, when the diode is conducting (in the 'on' state), the voltage across it is negligible (approaching zero), which aligns with statement (d).