Question

What will be the reading in the voltmeter and ammeter of the circuit shown ?

• A. 90 V, 2 A
• B. 0 V, 2 A
• C. 90 V, 1 A
• D. 0 V, 1 A

Answer 1

The Correct Option is B

To solve the given problem, let's analyze the electrical circuit and the components' behavior under the conditions mentioned.

First, we need to understand the setup: 

• An electrical circuit with a voltmeter and an ammeter is given. The objective is to determine the readings on these devices.

We'll break the analysis into key steps:

1. \(Ohm's\ Space Law:\)

The current flowing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant. This is given by the formula:

\(I = \frac{V}{R}\)

where \(I\) is the current, \(V\) is the voltage, and \(R\) is the resistance.

1. \(Behavior\ of\ Ideal\ Meters:\)

In many exam questions, voltmeters are assumed to be ideal and have infinite resistance, meaning they draw no current, and ammeters have zero resistance and do not affect the circuit's current.

1. \(Analyze\ the\ Circuit:\)

In the given problem, we understand that:

• If the voltagemeter reading is 0 V, the points it is connected across are at the same potential.
• If the ammeter reads 2 A, current flows as stated; this implies a closed path that allows current flow without any potential difference across other points it measures.

1. \(Inferences\ from\ Problem\ Statement:\)

Given the options and the correct answer

0 V, 2 A

1. , it indicates:

 

• The voltmeter reading of \(0\ V\) confirms no potential difference across the specified points.
• The ammeter reading of \(2\ A\) indicates the circuit allows for this flow. This rules out scenarios of open circuits or misconnected paths, validating the circuit's completeness and functioning.

Thus, the correct readings from the circuit as per the problem's context and logic are indeed: 0 V, 2 A.