Kirchhoff S Laws

Step 1: Voltage division.
The voltmeter readings depend on their resistance. The voltage across two voltmeters with different resistances will be different. Hence, and will be different.
Thus, the correct answer is (4).

Step 1: Analyze the circuit.
Use Kirchhoff's law to analyze the potential drop across the resistors. The total potential difference across the resistors is 16 V.
Step 2: Calculate the current.
Using Ohm's law , the current passing through the resistance is calculated to be 3.5 A. Final Answer:

Step 1: Understanding the Concept:
A Wheatstone Bridge is an electrical circuit used to measure an unknown electrical resistance. It consists of four resistances arranged in a diamond shape. The bridge is said to be "balanced" when the potential difference between the middle junctions is zero, resulting in no current flow through the galvanometer.

Step 2: Identifying the Condition for Balance:
For a bridge with arms and , the balance condition is: In this state, the galvanometer shows a "null deflection."

Step 3: Detailed Explanation:
In the given problem:
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• Calculating the ratios: Since , the bridge is perfectly balanced. Because the potential at the two junctions where the galvanometer is connected is identical, no potential difference exists to drive a current.

Step 4: Final Answer
The current flowing through the galvanometer is zero.