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____________?

Related Mcqs:

1. If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is_________________?

   A. 50 mA
   B. 70 mA
   C. 120 mA
   D. 40 mA

2. 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

3. In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is_______________?

   A. 48 mA
   B. 12 mA
   C. 0 A
   D. 3 mA

4. 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

5. Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 Ω, the current through each parallel resistor is____________?

   A. 25 mA
   B. 100 mA
   C. 6.25 mA
   D. 200 mA

6. 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

7. When an additional resistor is connected across an existing parallel circuit, the total resistance____________?

   A. remains the same
   B. decreases by the value of the added resistor
   C. increases by the value of the added resistor
   D. decreases

8. 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

9. 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

10. If one of the resistors in a parallel circuit is removed, the total resistance_____________?

    A. decreases
    B. increases
    C. remains the same
    D. doubles