Physics · Semiconductor Devices
What is the primary purpose of using a transistor in a relay driver circuit?
- 1To filter out high-frequency noise
- 2To provide high input impedance in the ON state
- 3To act as a switch to control and energize the relay coil✓
- 4To amplify the audio frequency input signal
Correct answer
To act as a switch to control and energize the relay coil
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