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In electromagnetism, displacement current is a quantity appearing in Maxwell's equations that is defined in terms of the rate of change of electric displacement field. Displacement current has the units of electric current density, and it has an associated magnetic field just as actual currents do. However it is not an electric current of moving charges, but a time-varying electric field.

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How does electric flux due to a point charge enclosed by a spherical gaussian surface get affected wheb its radius increases

Posted by Khushi Tiwari 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Vipin Kumar 6 years, 11 months ago

Electric flux[ø]=sigma/€• Sigma =q/a where a =4πr². Therefore E=q/4πr²€•

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How to set up a common base transistor circuit and to study its input and output characteristics and transfer characteristics to calculate the current gain

Posted by Yash Raj 6 years, 11 months ago

CBSE > Class 12 > Physics

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Relatin between current density and electric field

Posted by Manish Namdeo 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Gudiya Yadav 6 years, 11 months ago

The relation between current density (j)and electric field(E) is that current density is equal to product of sigma and electric field j=sigma× E

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Please give me circuit daigram of solenoid engine

Posted by Gurdeep Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

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Draw a ray diagram for the formation of image of a point object by a thin double convex lens having radii curvature r1 and r2 hence derive lens maker formula for a double convex lens

Posted by Karan Bhatia 6 years, 11 months ago

CBSE > Class 12 > Physics

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In a plane electromagnetic wave,the electric field oscillates with frequency 20×10 to the power 10 Hz and amplitude 48vm_1. What is wavelength of the wave?

Posted by Chhavi Das 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Gudiya Yadav 6 years, 11 months ago

We have studied a formula that c=wavelength×frequency C=3×10^8 and given,v=20×10^10hz Wavelength=3×10^8/20×10^10 =0.015m

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Electric dipole moment is a scalar or vector

Posted by Nilakandan Ravi 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Jitendra Mosalpuria 6 years, 11 months ago

It's vector quantity

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Saranna Hansda 6 years, 11 months ago

It is a vector quantity. Its direction is from the negative charge to the positive charge.

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Define the term resolving power of an astronomical telescope.

Posted by Hem Lata 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Gudiya Yadav 6 years, 11 months ago

It is the recipocal of shortest angular separation between two point object whose image just can resolved by the telescope

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Devil ? 6 years, 11 months ago

The shortest distance by which a telescope can distinguish two far objects is called resolving power of astronomical telescope.

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What is plane polarise light

Posted by Ajit Patel 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

The light emitted by common sources ,e.g. Sun or the electric light bulb is known as unpolarized light. More specialised sources, such as lasers, etc. produce polarized light.
The electromagnetic radiations have waves of different wavelength. If these radiations are passed through some kind of polariser which emits only single phase radiations, the light is known as plane polarised light.

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What is optical detector

Posted by Abhinav Bhandari 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Gudiya Yadav 6 years, 11 months ago

Object which sensitive to light response the presence of light are optical detectors

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Devil ? 6 years, 11 months ago

Photo diode is is optical detector

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The network PQRS shown in the circuit diagram has the batteries of 4 volt and 5 volt and negligible internal resistance A milliammeter of 20 ohm resistance is connected between P and R calculate the reading of the milliammeter

Posted by Aditya Suri Chandra 4 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Abhey Nijjer 5 years, 2 months ago

ans

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I am currently in 11 std .... I want to score 180+ in jee mains What would be the strategy to do so

Posted by Shatayu Ganvir 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Shatayu Ganvir 6 years, 11 months ago

Means which questions

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Sujal Sharma 6 years, 11 months ago

You have to solve 11th ncert books plus ncert exempler books which contain jee mains level questions

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What's Watless Current…

Posted by Monťý Harsh 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Vipin Kumar 6 years, 11 months ago

When the average power is zero then the current is called watless current. You can calculate the average power by VrmsIrmsCosø . Incase of inductor and capacitor the value of cos ø is 90

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Aman Singhal 6 years, 11 months ago

Y66

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What is the formula for real & apparent depth ?

Posted by Chandan Dixit 6 years, 11 months ago

CBSE > Class 12 > Physics