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Lesson Posted on 15 Mar Tuition/BTech Tuition/BTech 1st Year Engineering Tuition/Class XI-XII Tuition (PUC)/Physics CBSE/Class 10/Science

Aritra Majumder

I am an experienced, qualified teacher and tutor with over five years of experience in teaching Physics,...

The topics covered in this part are given below: • Oersted’ Experiment • Magnetic Field • Moving Charge & Magnetic Field • Lorentz Force • Magnetic force on a current-carrying conductor • The motion of a charged particle in a... read more

The topics covered in this part are given below:

• Oersted’ Experiment

• Magnetic Field

• Moving Charge & Magnetic Field

• Lorentz Force

• Magnetic force on a current-carrying conductor

• The motion of a charged particle in a Magnetic Field

• The motion of a charge in Combined Electric and Magnetic Fields

• Cyclotron

Electromagnetism is a branch of Physics, deals with the electromagnetic force that occurs between electrically charged particles. The electromagnetic force is one of the four fundamental forces and exhibits electromagnetic fields such as magnetic fields, electric fields, and light. It is the basic reason electrons bound to the nucleus and responsible for the complete structure of the nucleus.

Before the invention of electromagnetism, people or scientists used to think magnetism and electricity are two different topics. The view has changed after James Clerk Maxwell published A Treatise on Electricity and Magnetism in the year 1873. The publication states that the interaction of positive and negative charges are mediated by one force. This observation laid the foundation to Electromagnetism. Later many scientists like Michael Faraday, Oliver Heaviside, and Heinrich Hertz contributed their ideas in electromagnetism.

Electromagnetism is a process where the magnetic field is created by introducing current in the conductor. When a conductor is electrically charged it generates magnetic lines of force of conductor. For example, if current i.e., positive charges moving in a wire, it produces the magnetic field along the wire and the direction of magnetic lines, and force can be determined using Right Hand Rule.

Oersted’ Experiment

During a lecture demonstration in 1820, the Danish physicist Hans Christian Oersted noticed that a current in a straight wire caused a noticeable deflection in a nearby magnetic compass needle. He further investigated this phenomenon and confirmed the phenomenon of the magnetic field around current carrying conductor.

Magnetic Field

It is the space around a magnet or current carrying conductor around which magnetic effects can be experienced. It is a vector quantity and its SI unit is Tesla (T) or Wb/m2.

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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

Sound whose wave frequency is too low (under 15-20 hertz) to be heard by humans. Some animals, such as elephants and whales, emit calls at infrasound frequencies.when the frequency of sound is below the human audible range of sound which is (20-20000)hz it is called infrasonic
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

it is easier to roll up a stone on sloping road than lifting vertically because while lifting vertically the work is done against its weight "mg" but when it is rolled up a slope then there is a component of this force only acting hence work done is less
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

amplitude is the maximum +ve or -ve dispacement of a wave while frequency is the no of oscillations made y the wave in 1 sec. amplitude governs the loudness while frequency governs the pitch or shrillness of a sound .
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

Collision between fast neutrons and nitrogen nuclei present in the atmosphere The neutrons these are produced in atmosphere from the sun radiation i.e.cosmic rays. So that the obtained neutron is then reacts with the nitrogen which is present in the atmosphere and produce radioactive element. read more
Collision between fast neutrons and nitrogen nuclei present in the atmosphere The neutrons these are produced in atmosphere from the sun radiation i.e.cosmic rays. So that the obtained neutron is then reacts with the nitrogen which is present in the atmosphere and produce radioactive element.
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

Fermi is the SI unit of Nuclear sizes.
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

(i) Positive: Cu (metals, alloys). (ii) Negative: Si (semiconductor).
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd),... read more
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.If light is represented as e=E sin(wt), than Intensity I=E^2.
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Answered on 09 Feb Tuition/Class XI-XII Tuition (PUC) Tuition/Class XI-XII Tuition (PUC)/Physics

Sujoy D.

Tutor

First law:In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force. Second law:In an inertial reference frame, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration... read more
First law:In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force. Second law:In an inertial reference frame, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration a of the object: F = ma. (It is assumed here that the mass m is constant) Third law:When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
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Answered on 18 Mar Tuition/Class VI-VIII Tuition Tuition/Class VI-VIII Tuition/Science Tuition/Class XI-XII Tuition (PUC) +1 Tuition/Class XI-XII Tuition (PUC)/Physics less

D. Mukherjee

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It is of four types. 1.Simply supported beam or simple beam 2. Semi continuous beam 3. Continuous 4. Cantilever beam
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