Voltage is converted into what in PSP?

• A. Analog signal
• B. Electrical current
• C. Digital signal
• D. Thermal signal

Answer: (D)

When voltage is applied across a resistive element, electrical energy is dissipated as heat. That heat changes the temperature of the element, and a temperature sensor can read this change as a signal. This is energy conversion from electrical to thermal form, so the signal that results from the input voltage is a thermal signal. The heat produced depends on the voltage and resistance (P = V^2 / R = I^2 R), which means higher voltage leads to more heat and a stronger thermal response. In PSP contexts, this thermal response is what’s measured and interpreted, making the thermal signal the appropriate description of what the voltage is converted into.