Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q61 (NDA-I/2009) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Electricity and magnetism Answer Verified

Which one of the following is the value of current I in the circuit shown below ?

Result
Your answer: —  Â·  Correct: A
Explanation

The correct answer is Option 1 (5 A). This conclusion is based on the application of Kirchhoff’s Current Law (KCL), which states that the algebraic sum of currents entering and leaving a junction is zero.

To determine the value of current I, follow these steps:

  • Analyze Junctions: Identify the nodes where multiple branches meet. Sum the currents entering the node and equate them to the currents leaving.
  • Nodal Analysis: By calculating the net current flow through the specific branch labeled I, the balance of input and output currents consistently yields a value of 5 A.
  • Verification: Other options (10 A, 15 A, 20 A) are incorrect as they would violate the principle of conservation of charge at the circuit nodes, leading to an unbalanced current distribution.

Therefore, 5 A is the only value that satisfies the equilibrium of the given electrical network.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
20%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-I · 2008 · Q23 Relevance score: 5.25

The figure shows current in a part of electrical network. What is the value of current I ?

CDS-II · 2022 · Q45 Relevance score: 3.27

An electrical circuit having combinations of resistances and capacitance is given below. The current, flowing through the circuit will be

CDS-I · 2002 · Q57 Relevance score: 3.23

In the electrical circuit (ABC) as shown in the figure given below, the resistances R1, R2 and R3 are same and equal to 30 ohm .If a source of voltage 2V is connected across one arm, the current drawn from the voltage source is

NDA-II · 2013 · Q7 Relevance score: 2.60

A current of 0.5 A is drawn by a filament of a clectric bulb for 20 minutes. The amount electric charge that flows through the circuit is

NDA-II · 2018 · Q38 Relevance score: 2.34

Consider the following circuit : Which one of the following is the value of the resistance between points A and B in the circuit given above? |r |r