Question

In the circuit shown below the reading of the voltmeter v is

Answer 1

Answer:

where is the circuit

pls. attach it

Answer 2

The voltmeter reading for the given circuit is 12 v

Explanation:

Ohm's law - Voltage is directly proportional to the current and Resistance in a circuit.

                                       $\text{V} \propto \text{I R}$

Voltmeter is an electronic device, which is used to find the potential difference between any two point in an electric circuit.

The formula to find the potential between two point x and y is ,

$\text{Potential difference} = \text{V}_\text{y} - \text{V}_\text{x}$

The voltmeter readings are measured in volts.

For the given circuit,

Potential difference between the point A and C is

$\text{Potential difference} = \text{V}_\text{C} - \text{V}_\text{A}$

$\text{V}_\text{C} - \text{V}_\text{A} = 1 \times 4 \ \text{volts} \ \ \ \ \ (\text{by Ohm's law}) \ \\ ----> (1)$  

Potential difference between the point B and C is

$\text{Potential difference} = \text{V}_\text{C} - \text{V}_\text{B}$

$\text{V}_\text{C} - \text{V}_\text{B} = 1 \times 16 \ \text{volts} \ \ \ \ \ (\text{by Ohm's law}) \\\ ---->(2)$

Subtract (2) from (1)

$\text{V}_\text{C} - \text{V}_\text{B} - \text{V}_\text{C} + \text{V}_\text{A} - = 16 - 4$

$- \text{V}_\text{B} + \text{V}_\text{A} - = 12 \ \text{volts}$

$\text{V}_\text{A} - \text{V}_\text{B} = 12 \ \text{volts}$

The potential difference between the point A and B will be the voltmeter reading.

The voltmeter reading is 12 volts.

To Learn More

1)While performing the experiment to find equivalent resistance of a combination of resistance by making a circuit as shown below aditi measures reading of voltmeter V which gives potential difference between P and Q. find its reading

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2) Explain the concept of electric potential difference in term of the work done in transferring the charge.

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