n identical light bulbs, drawing P power from voltage supply, are joined in series. The total power drawn is

Electric power can be defined as the rate at which work is done or energy is converted into an electrical circuit. It is basically a measurement of energy used in a span of time.

Step 1: Use of Formula

In order to calculate, we need to use the formula of electric power, which is given by:

P = VI

Here,

P = Power
V = Potential difference in Circuit
I = Electric Current

Power can be represented as:

⇒ P = I²R
⇒ \(P = {{V^2} \over R}\)

The two expressions were obtained by using Ohm’s Law, wherein Voltage, Current, and Resistance are all interrelated with one another. Ohm’s Law is given by:

V = IR

Where,

R = Resistance in the Circuit
V = Potential difference
I = Electric Current

Step 2: Find Solution

Let’s first consider the following readings:

A voltage of the source = V
Resistance of each bulb = R

Hence, \(R = {{V^2} \over P}\)

The amount of Power drawn by each bulb can be given by = i²R = \({{V^2} \over n^2R^2} \times R\)

=\({{V^2} \over n^2R} \)

= \({{P} \over n^2}\)

Read Also: Ohm’s Law and its Limitations

Related Questions:

Check Out:

Important Topics Based on Ohm’s Law
Relation between kva and kw	Difference between RTD and thermocouple	Types of Current
Ampere	Cells, emf, Internal Resistance	Derivation of Drift Velocity
Potentiometer	Electromotive Force	Unit of Specific Resistance
Static Electricity	Difference between AC and DC	Wheatstone Bridge
Resistor Colour Codes	Difference between kva and kw	Permittivity And Permeability
Electric Dipole	Current Density	Meter Bridge
Unit of Current	Relation between resistance and length	Electrical Formula
Kirchhoff’s Rules	Difference between Air Conditioning and Refrigeration	Internal resistance formula
Resistivity Temperature Dependence	Cells in Series and in Parallel	Types of Resistors
Current density formula	Difference Between Primary Cell and Secondary Cell	Circuit Diagram
Resistivity formula	Differences Between Acceleration and Velocity	Power Of Alternating Current
Current Electricity NCERT Solutions	Drift Velocity	Combination of Resistors
Carbon Resistor	Uses of Resistor	Voltage Divider Formula
Difference between Earth and Neutral	Difference between emf and Voltage	Current Electricity
Power transformers	Relation between Power and Resistance	Resistance Formula

CBSE CLASS XII Related Questions

1.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

View Solution

2.
Write any two features of nuclear forces.

View Solution

3.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

\( \frac{q}{4 \pi \epsilon_0 l^2} \) pointing along MA
\( \frac{q}{\pi \epsilon_0 l^2} \) pointing along AM
\( \frac{q}{2 \pi \epsilon_0 l^2} \) pointing along AM
Zero

View Solution

4.
If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

View Solution

5.
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

View Solution

6.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

View Solution

n identical light bulbs, drawing P power from a voltage supply, are joined in series. The total power drawn is

Step 1: Use of Formula

Step 2: Find Solution

CBSE CLASS XII Related Questions

1.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2.
Write any two features of nuclear forces.

3.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

4.
If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

5.
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

6.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

n identical light bulbs, drawing P power from a voltage supply, are joined in series. The total power drawn is

Step 1: Use of Formula

Step 2: Find Solution

CBSE CLASS XII Related Questions

1. Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2. Write any two features of nuclear forces.

3.The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

4. If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

5. If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

6.A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2.
Write any two features of nuclear forces.

3.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

4.
If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

5.
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

6.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.