What are the applications of ohm's law used in daily life?

Ohm’s law states that voltage across a conductor is proportional to the current flowing through it, provided all physical conditions and temperature stays constant.

Applications of Ohm’s law in daily life

The speed of fans in our houses can be regulated by shifting the regulator too and fro. The current flowing through the fan is managed by controlling the resistance through the regulator. The resistance, current, and power can therefore be calculated by Ohm’s law for any input value.
Electric kettles and irons contain a lot of resistors that restrict the flow of current through them to produce heat. The size of resistors can be defined by Ohm’s law.
Electrical heaters contain a metal coil of high resistance allowing a specific amount of current to pass through to provide the heat. The power of heaters can be determined through Ohm’s law.

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CBSE CLASS XII Related Questions

1.
Read the following paragraph and answer the questions that follow.
In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.

2.
An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.

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An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.

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4.
Write two advantages of reflecting telescope over refracting telescope.

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5.
In a telescope the objective has much larger aperture than the eye piece. Why ?

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6.
Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.

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What are the applications of ohm's law used in daily life?

Applications of Ohm’s law in daily life

Related Questions

CBSE CLASS XII Related Questions

4.
Write two advantages of reflecting telescope over refracting telescope.

5.
In a telescope the objective has much larger aperture than the eye piece. Why ?

Similar Physics Concepts

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What are the applications of ohm's law used in daily life?

Applications of Ohm’s law in daily life

Related Questions

CBSE CLASS XII Related Questions

4.Write two advantages of reflecting telescope over refracting telescope.

5.In a telescope the objective has much larger aperture than the eye piece. Why ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

4.
Write two advantages of reflecting telescope over refracting telescope.

5.
In a telescope the objective has much larger aperture than the eye piece. Why ?