Parallel Circuits Questions and Answers
Parallel Circuits play a vital role in understanding how electrical components share voltage and current in electronic systems. For exams like GATE, ISRO, SSC JE, and other engineering entrance tests, aptitude questions and answers based on parallel circuits are frequently asked. In such circuits, resistors, capacitors, or inductors are connected so that each component gets the same voltage. This makes the concept critical for analyzing real-life networks and troubleshooting electrical designs. Our Parallel Circuits questions with answers section provides solved examples, circuit analysis problems, and shortcuts to quickly calculate equivalent resistance or total current. Practice these to improve your problem-solving speed in aptitude test practice online modules.
Parallel Circuits
1. When parallel resistors are of three different values, which has the greatest power loss?
- The smallest resistance
- The largest resistance
- They have the same power loss.
- Voltage and resistance values are needed.
3. The voltage across any branch of a parallel circuit:
- varies as the total current varies
- is inversely proportional to total circuit resistance
- is equally applied to all branch conductances
- is dropped in proportion to each branch resistance
4. What is the total power loss if 2 k and 1 k parallel-connected resistors have an IT of 3 mA?
- 6 W
- 36 W
- 6 mW
- 36 mW
5. What happens to total resistance in a circuit with parallel resistors if one of them opens?
- It increases.
- It halves.
- It remains the same.
- It decreases.
6. Components that connect in parallel form:
- branches
- open circuits
- short circuits
- a voltage divider
7. A parallel circuit differs from a series circuit in that a parallel circuit has
- no path for current flow
- fewer paths for current flow
- one path for current flow
- more than one path for current flow
8. If two parallel-connected resistors dissipate 6 watts and 10 watts of power, then what is the total power loss?
- 3.75 watts
- 4 watts
- 16 watts
- 60 watts
9. Kirchhoff's current law for parallel circuits states that the:
- sum of all branch voltages equals zero
- total circuit resistance is less than the smallest branch
- sum of currents into a junction is equal to the difference of all the branch currents
- sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction
10. If 550 mA of current leaves a node that had 250 mA entering from one branch, how much current would enter from the other?
- 250 mA
- 300 mA
- 550 mA
- 800 mA