engineering recuitment Gujarat Metro JE Mock Test 2023 Power Systems Protective Relays Electromechanical Relays
Which of the following is NOT an advantage of relays?
1
Relays can switch AC and DC.
2
Relays use less power due to the current flowing through their coil.
3
Relays can switch many contacts at once.
4
Relays can switch high voltages.