The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?

Related Mcqs:

1. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?

   A. 6.4 A, 6.9 A
   B. 6.4 A, 9.6 A
   C. 4.6 A, 6.9 A
   D. 4.6 A, 9.6 A

2. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________?

   A. 160 ohms
   B. 80 ohms
   C. 20 ohms
   D. 10 ohms

3. A resistance having rating 10 ohms, 10 W is likely to be a__________?

   A. metallic resistor
   B. carbon resistor
   C. wire wound resistor
   D. variable resistor

4. Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?

   A. 100 Ω
   B. 200 Ω
   C. 300 Ω
   D. 400 Ω

5. Which of the following statement is true both for a series and a parallel D. C. circuit?

   A. Elements have individual currents
   B. Currents are additive
   C. Voltages are additive
   D. Power are additive

6. If a parallel circuit is opened in the main line, the current_______________?

   A. increases in the branch of the lowest resistance
   B. increases in each branch
   C. is zero in all branches
   D. is zero in the highest resistive branch

7. When one leg of parallel circuit is opened out the total current will______________?

   A. reduce
   B. increase
   C. decrease
   D. become zero

8. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be_________________?

   A. 9 times
   B. 1/9 times
   C. 1/3 times
   D. 3 times

9. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is

   A. 0.625 × 10¹⁹
   B. 1.6 × 10¹⁹
   C. 1.6 × 10-¹⁹
   D. 0.625 × 10-¹⁹

10. When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?

    A. 1 n-mho
    B. 106 mho
    C. 1 milli-mho
    D. none of the above