There are basically two reasons for doing so, one is to remove GROUND BOUNCE one more reason is circuit complexity demands a large amount of current flowing through the circuits, and multiple grounds help in dissipating the accumulated heat so that device will be safe.
When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is A. overheated B. shorted C. open D. reversed
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
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