An SCR (silicon-controlled rectifier) is frequently used as aswitch of AC currrent. If you saw a schematic of a circuit of an ACpower heater tha SCR controller, so that if the heater wascontrolled from 0 to 100% single phase, how many SCR's would youtypically expect to see in the circuit.
a. one
b. two
c. three.
You see Solid State Relay in a cabinet controlling an ACCircuit. A key difference in troubleshooting this device over astandard contact relay is ...
a. A solid state relay will normally show off -state leakage
b. Measurements will show a on-state voltage drop across thecontacts
c. Both a and b.
A photo diode is commonly used as a light sensor. This devicefunctions because.
a. light reduces the forward bias resistance
b. light increases the forward bias resistance.
c. heat from the light cause eletron flow.
A solid state relay is switching 50 Amps. The relay is usingTriac whose on -state voltage drop is 2 Volts. The power supply is120VAC. Using the formula Power = Volts x Amps, calculate the power(heat) that needs to be disipated by this relay when it isconducting.
a. 50 watts
b. 100 watts
c. 10 watts.
