CBSE > Class 12 > Physics | CBSE Board | Homework Help

In self inductance,induced current(or e.m.f.) is generated in same coil having opposit direction to the main current flowing in coil.Whereas in mutual inductance,induced current(or e.m.f) is generated in other coil due to another coil in which the main current is flowing.

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What is the actual definition of ampere

Posted by Ca Crafted World 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Kajal Tyagi 6 years, 5 months ago

One ampere is defined as one coulomb of charge flowing through the circuit in one second.

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Vikas Semwal 6 years, 5 months ago

Flow of charge per unit time....... Means transfer of charge in unit time

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a sinusoidal voltage of peak value 285v is applied to a series LCR corcuit in which rersistor of resistance 5Ohm,pure inductor of inductance 28.5mH and capacitor of capacitance 800F are connected. find the resistant frequency

Posted by Navin Bashetti 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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What is a watless current

Posted by Vikas Semwal 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Geshu Kumari 6 years, 5 months ago

The current in an AC circuit is said to be wattless current, when the average power consumed in such circuit corresponds to zero.

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What is the application of LCR circuit

Posted by Pawan Kumar 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Khuskaran Sidhu 6 years, 5 months ago

Used in mobiles,tvs etc.

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What are cyclotron

Posted by Navin Kumar 6 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Kajal Tyagi 6 years, 5 months ago

Cyclotron(accelator) is a device which accelerates the charge particle. It is made up of two hollow D's. First is D1 and second one is D2. These are connected with an oscillator and placed in magnetic field . Whole system is kept in free chamber(vaccum). When a charge particle is kept in this system the two hollow D's changes the polarity one by one and charge particle starts accelerating.

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Yogita Ingle 6 years, 5 months ago

Cyclotron:

Cyclotron is a device used to accelerate charged bodies to very high velocities (or high kinetic energies) using crossed (or mutually perpendicular) electric and magnetic fields
Cyclotron is based on the independency of frequency (of rotation of charged particle) on the energy (velocity) and radius (of revolution) of charged particle. The motion of charge , electric field, and the magnetic field are mutually perpendicular(θ= 90°), so:

fc = 1/T = qB(sinθ)/(2πm) = qB/(2πm)

Cyclotron is made up of 2 hollow metallic discs D1 and D2, semi-circular in shape and an oscillator.

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Neha Choudhary 6 years, 5 months ago

It is an electromagnetic device use to accel.the heavly charge particals like protons

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Three point charges +Q,+2Q,-3Q are placed at the vertices of an equilateral triangle ABC of side l .if these charges are displaced to the mid point A1,B1,C1 resp. Find the amount of work done in shifting the charges to their new position

Posted by Cletus Cherian 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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What is the power factor of an LCR series circuit at resonance

Posted by Nikhil Chaudhary 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Vikas Semwal 6 years, 5 months ago

rms×Vrms × cos¢ = power and cos ¢ is power factor... During resonance condition power factor becomes maximum ie maximum value of cos¢ = 1

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Sia ? 6 years, 5 months ago

Resonance by definition is a condition when capacitive and inductive reactances cancel each other, and circuit is purely resistive. So power factor of the circuit at resonance is unity.

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When cbse release model paper 2019_20

Posted by Aman Singh 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Prateek Mishra 6 years, 5 months ago

Sample papers are realeased

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Latest news about class 12th practicals whether they will be conducted outside or inside the school

Posted by Adavya Kayasth 6 years, 5 months ago

CBSE > Class 12 > Physics

6 answers

Srishti Choudhary ✍⏳ 6 years, 5 months ago

Inside..only in delhi region there will be outside

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Ron Vineetahuja 6 years, 5 months ago

Outside

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Prateek Mishra 6 years, 5 months ago

Outside in delhi only

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Vivekanand Yadav 6 years, 5 months ago

Only outside in delhi reasion

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Khuskaran Sidhu 6 years, 5 months ago

Outside only in Delhi region

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Asmit Kumar 6 years, 5 months ago

Outside

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When a wave goes under at a denser medium is there any change in phase

Posted by Ron Vineetahuja 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Vikas Semwal 6 years, 5 months ago

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Khuskaran Sidhu 6 years, 5 months ago

No, phase remains same but wavelength & velocity change

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Tell me about all formulas of physics class 12 cbse

Posted by Azhar Khan 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Ron Vineetahuja 6 years, 5 months ago

❓Are you mad we will tell about all formulas of physics of all chapters

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Isha Bhardwaj 6 years, 5 months ago

What? Are u serious....

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dimensional formula of current

Posted by Samar Pandey 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Vikas Semwal 6 years, 5 months ago

Coulamb per second....... Tinvesre

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Vidushi Chaudhary 6 years, 5 months ago

Unit is ampere.. dimension is (A)

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Quanization charge

Posted by Abhishek Patel 6 years, 5 months ago

CBSE > Class 12 > Physics

5 answers

Kajal Tyagi 6 years, 5 months ago

The fact that electric charge is always an integral multiple of electron is termed as quantisation of charge. Q=ne (e=charge of electron) & (n=1,2,3,4- - - - -,n)

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Kajal Tyagi 6 years, 5 months ago

The fact that electric field is always an integral multiple of electron is termed as quantisation of charge. Q=ne (e = charge of electron) & ( n=1,2,3,4--------,n)

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Muskan Jangra 6 years, 5 months ago

It means charge on anybody is integral multiple of charge on proton or on electron i.e. q= ne where n= no. Of electrons ,e= charge on electron .

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Khuskaran Sidhu 6 years, 5 months ago

A body can only have fixed values of charge i.e. q=ne,n=whole no.

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Charchit Kumawat 6 years, 5 months ago

Q=ne

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