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.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.

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.

3.
If T is the time period of the rotation of the coil, at what values of t in a cycle, the emf generator is maximum ?

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4.
A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

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6.
In a telescope the objective has much larger aperture than the eye piece. Why ?

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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

3.
If T is the time period of the rotation of the coil, at what values of t in a cycle, the emf generator is maximum ?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

6.
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

3.If T is the time period of the rotation of the coil, at what values of t in a cycle, the emf generator is maximum ?

5.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

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

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

3.
If T is the time period of the rotation of the coil, at what values of t in a cycle, the emf generator is maximum ?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

6.
In a telescope the objective has much larger aperture than the eye piece. Why ?