Which one of the following transducers is a self-generating type transducer?a) Active transducerb) Passive transducerc) Bothd) None

Answer

The correct option is a) Active transducer.

Explanation

Active transducers are devices that generate their own electrical signals in response to a physical phenomenon, such as temperature, light, or pressure. Examples include thermoelectric generators and piezoelectric sensors, which convert thermal or mechanical energy directly into electrical energy.

On the other hand, passive transducers do not generate energy. Instead, they require an external power source to operate, as they only convert a physical input (like heat or pressure) into an output signal (like resistance, capacitance, or inductance), which still needs external power for function.

Thus, only active transducers qualify as self-generating types.