_15. The voltage on the emitter of a UST just before it fires is called the a) cutoff region b) valley voltage c) saturation region d) peak voltage _15, An LDR's resistance in the presence of...

_15. The voltage on the emitter of a UST just before it fires is called the a) cutoff region b) valley voltage c) saturation region d) peak voltage _15, An LDR's resistance in the presence of light a) decreases c) increases (b) alternates d) Induces electrical flow