A telephone wire has a current of 20 ? A flowing through it. How long does it take for a charge of 15 C to pass through the wire?
What will be an ideal response?
i = 20 µA
q = 15 C
t = q/i = 15/(20x10-6) = 750x10³ hrs
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The sum of currents in each branch of a parallel circuit will ________ total circuit current
A) Be less than B) Equal C) Be more than D) None of these
Intake charge velocity has to be ________ to prevent fuel droplet separation
A) 300 feet per second B) 50 feet per second C) 100 feet per second D) 25 feet per second
Technician A says a Hall Effect switch voltage signal goes from 12 V to 0 V when the rotating metal blade enters the switch. Technician B says a Hall Effect switch produces an analog voltage signal. Who is correct?
A. A only B. B only C. both A and B D. neither A nor B
An automobile fuel injector system is depicted in Figure P10.37(a). The internal circuitry of the injector can be modeled as shown in Figure P10.37(b). The injector will inject gasoline into the intake manifold when Iinj ? 0.1 A. A voltage pulse train vsignal is shown in Figure P10.37(c). For a cold engine at start-up, the pulse width ? is determined by:
? = BIT × KC + VCIT where
BIT = basic injection time = 1 ms
KC = compensation constant of temperature of coolant (TC )
VCIT = voltage-compensated injection time
The characteristics of VCIT and KC are shown in Figure P10.37(d). Assume the transistor Q1 saturates at VCE = 0.3 V and VBE = 0.9 V. Find the period of the fuel injector pulse if:
a. Vbatt = 13 V, TC = 100°C
b. Vbatt = 8.6 V, TC = 20°C
