Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is______________?
A. 25 Ω
B. 500 Ω
C. 100 Ω
D. 20 Ω
Month: December 2018
One condition for oscillation is_____________?
One condition for oscillation is_____________?
A. A phase shift around the feedback loop of 180o
B. A gain around the feedback loop of one-third
C. A phase shift around the feedback loop of 0o
D. A gain around the feedback loop of less than 1
The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω that makes up part of the parallel circuit is approximately_______________?
The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω that makes up part of the parallel circuit is approximately_______________?
A. 22 mA
B. 120 mA
C. 220 mA
D. 50 mA
The crystal oscillator frequency is very stable due to___________of the crystal?
The crystal oscillator frequency is very stable due to___________of the crystal?
A. Rigidity
B. Vibrations
C. Low Q
D. High Q
In a phase shift oscillator, the frequency determining elements are _______________?
In a phase shift oscillator, the frequency determining elements are _______________?
A. L and C
B. R, L and C
C. R and C
D. None of the above
Hartley oscillator is commonly used in______________?
Hartley oscillator is commonly used in______________?
A. Radio receivers
B. Radio transmitters
C. TV receivers
D. None of the above
A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately________________?
A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately________________?
A. 790 Ω
B. 470 Ω
C. 60 Ω
D. 30 Ω
Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is______________?
Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is______________?
A. 12.5 Ω
B. 200 Ω
C. 20 KΩ
D. 50 Ω
In an LC oscillator, the frequency of oscillator is____________L or C?
In an LC oscillator, the frequency of oscillator is____________L or C?
A. Proportional to square of
B. Directly proportional to
C. Independent of the values of
D. Inversely proportional to square root of
When a 1.6 kΩ resistor and a 120Ω resistor are connected in parallel, the total resistance is____________?
When a 1.6 kΩ resistor and a 120Ω resistor are connected in parallel, the total resistance is____________?
A. greater than 1.6 kΩ
B. greater than 120 but less than 1.6 kΩ
C. less than 120 but greater than 100 Ω
D. less than 100 Ω