Question 76Electricity & Electronics - 1st Asst/Chief

The correct answer is B) voltmeter or transistor tester. To test a transistor in-circuit, you should use a voltmeter or a dedicated transistor tester. These tools allow you to measure the voltage across the transistor's terminals, which can help determine if the transistor is functioning properly. This is the recommended approach because it allows you to test the transistor without removing it from the circuit. The other options are not suitable for in-circuit transistor testing. A wattmeter measures power, an impedance meter measures resistance, and an ohmmeter can only be used to test a transistor out-of-circuit. These tools do not provide the necessary voltage measurements to properly evaluate a transistor's operation while it is still connected in the circuit.