BJT as current controlled device -
Base current controls the collector an emitter currents
FET as voltage controlled device-
Field of p or n region decides width of conducting channel in n type or p type FET
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat? A. 33 B. 330 C. both resistors D. neither resistor
A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is A. 132 mW B. 13.2 mW C. 22.6 mW D. 226 mW
A 75 load uses 2 W of power. The output voltage of the power supply is approximately A. 120 V B. 1.2 V C. 12 V D. 6 V
When the current through a 12 k resistor is 8 mA, the power is A. 7.68 mW B. 768 mW C. 7.68 W D. 76.8 W
How much continuous current can be drawn from a 60 Ah battery for 14 h? A. 42.8 A B. 428 A C. 4.28 A D. 4.2 A
The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be A. 2 W B. 1 W C. 5 W D. 0.5 W
A half-watt is equal to how many milliwatts? A. 5,000 mW B. 5 mW C. 500 mW D. 50 mW
Three hundred joules of energy are consumed in 15 s. The power is A. 2,000 W B. 2 W C. 20 W D. 200 W
A 3.3 k resistor dissipates 0.25 W. The current is A. 8.7 mA B. 87 mA C. 8.7 µA D. 8.7 A
A 220 resistor dissipates 3 W. The voltage is A. 73.3 V B. 2.5 V C. 25.7 V D. 257 V
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