If one of the resistors in a parallel circuit is removed, the total resistance_____________?
A. decreases
B. increases
C. remains the same
D. doubles
Month: December 2018
The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is____________?
The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is____________?
A. 200 mA
B. 540 mA
C. 1.24 A
D. 900 mA
In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?
In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?
A. Increased 2 times
B. Decreased 4 times
C. Increased 4 times
D. Decreased 2 times
Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?
Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?
A. 60 mA
B. 15 mA
C. 135 mA
D. 31.25 mA
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance______________?
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
In Colpitt’s oscillator, feedback is obtained___________?
In Colpitt’s oscillator, feedback is obtained___________?
A. A. By magnetic induction
B. By a tickler coil
C. From the centre of split capacitors
D. None of the above
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance_____________?
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______________?
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
In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that____________?
In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that____________?
A. R3 is open
B. R1 is open
C. R2 is open
D. the circuit is operating properly
For an oscillator to properly start, the gain around the feedback loop must initially be_________?
For an oscillator to properly start, the gain around the feedback loop must initially be_________?
A. 1
B. Greater than 1
C. Less than 1
D. Equal to attenuation of feedback circuit