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______________?
(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?
(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____________?
(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
An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately___________?
(A) 55 Ω
(B) 5.5 Ω
(C) 50 Ω
(D) 9 Ω
Four 8 Ω speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers_____________?
(A) 18 W
(B) 1.5 W
(C) 48 W
(D) 72 W
A sudden increase in the total current into a parallel circuit may indicate______________?
(A) a drop in source voltage
(B) an open resistor
(C) an increase in source voltage
(D) either a drop in source voltage or an open resistor
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance______________?
(A) is less than 6 kΩ
(B) is greater than 1.2 kΩ
(C) is less than 1.2 kΩ
(D) is less than 600 Ω
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance_____________?
(A) is less than 6 kΩ
(B) is greater than 1.2 kΩ
(C) is less than 1.2 kΩ
(D) is less than 600 Ω
The following resistors are in parallel across a voltage source: 220Ω , 470Ω , and 560Ω . The resistor with the least current is______________?
(A) 220 Ω
(B) 470 Ω
(C) 560 Ω
(D) impossible to determine without knowing the voltage