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How to find potential energy of a system...? In electrostatic

Posted by Puneet Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Mathematical relation between magnetic flux and frequency

Posted by Divya Jyoti 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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What is absorbent

Posted by Deepak Gola 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Akash Porwal 6 years, 10 months ago

Its a bulk phenomena in which conc. Of bulk is more than that of surface , In absorbent molecules of other atom are joined attached to the bulk . Eg sponge dipped in a water

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By cutter a part or middle of lens what effect on focal length of lens

Posted by Kumari Chandani 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 6 years, 10 months ago

F=reamain same

Rounak Gupta 6 years, 10 months ago

focal length will remain same but intensity will be reduced

3Thank You

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From where we should get cbse last year papers solution

Posted by Ygendra Singh 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Hema Bisht 6 years, 10 months ago

CBSE GUIDE

3Thank You

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Why the width of depletion layer is thin due to high doping in a zener diode

Posted by Sonam Malik 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 6 years, 10 months ago

Because of reverse bias. It increases the width of deplition layer

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working of moving coil galvanometer notes

Posted by Ðeep Längthasa 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Akash Porwal 6 years, 10 months ago

Restoring torque equals to torque experienced by coil NBACOSwt =IAlpha

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what ar the topics which are not included for cbse board exam this year?

Posted by Dharshika As 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 6 years, 10 months ago

Plee ans yr

Gudiya Yadav 6 years, 10 months ago

Their is no change in the syllabus from last year on paper pattern has change

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Why the voltage for external battery is low for forward bias and high for reverse bias

Posted by Sonam Malik 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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what is the force bitween two smoll charge sphiris having chargs of 2×10-7 c° and 3×10-7 placed 30 cm a part in air?

Posted by Aryan Raj Arya 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 10 months ago

Put the value in formul 1/4π€° q1q2 /r2

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Why the reverse characteristics graph lies in the third quadrant

Posted by Sonam Malik 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Which is remarkable optical instrument

Posted by Aman Tirkey 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Shivanshu Kulshrestha 6 years, 10 months ago

Human Eye

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Can anyone tell me a topic in physics that have not model

Posted by Gudiya Yadav 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Write two important considerations while fabricating a zener diode

Posted by Sonam Malik 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 10 months ago

Important considerations while fabricating Zener diode are:
i) Heavily doped p and n junctions are to be used for fabricating Zener diode.
ii) The breakdown voltage of the material must be noted down to avoid destruction of the device.

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Any guaranteed question for 2019

Posted by Kingchum Dzongbu 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Nagla Miyan Sefai 6 years, 10 months ago

Wavefront

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Using Gauss's law obtain the electric flux due to point charge q enclosed in a cube of side a

Posted by Raja Chouhan 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Sir is ray optics will be included in Class12 2019-2020 session

Posted by Pankaj Sunal 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Neha ?? 6 years, 10 months ago

No it will be in +1 from next session..

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Which experiments are the common one that the examiner give to perform

Posted by Septima Ravenclaw 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 6 years, 10 months ago

Meter bridge or optical bench

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Set up relation between current and drift velocity

Posted by Bittu Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 6 years, 10 months ago

We know the relation that I=neAVd Where I is the current and Vd is the drift velocity

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How can we convert a transistor circuit to an amplifier circuit?

Posted by Septima Ravenclaw 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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What is light vector

Posted by Divyanshu Balaiwar 6 years, 10 months ago

CBSE > Class 12 > Physics

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A tank is filled with water to a hight of 12.5 cm.The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?

Posted by Shubham Rai 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 10 months ago

Actual depth of the needle in water (h1) = 12.5 cm

Apparent depth of the needle in water (h2) = 9.4 cm

Refractive index of water = μ

The value of μ can be obtained

μ = h1/ h2 = 12.5/9.4 = 1.33

Hence, the refractive index of water is about 1.33.

Water is replaced by a liquid of refractive index (μ1) = 1.63

The actual depth of the needle remains the same, but its apparent depth changes. Let y be the new apparent depth of the needle.

Hence,

μ1 = h1/y

y = h1/μ1

= 12.5/1.63 = 7.67 cm

Distance by which the microscope should be moved up = 9.4 – 7.67 = 1.73 cm

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What is the principle of cyclotron..?

Posted by Sa Ty 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Lavesh Bohra 6 years, 10 months ago

Cyclotron works on principal that when a charged particle is placed in external magnetic field it experience lorentz force sue to which it moves in circular path

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Explain why atmospere is not electrically neutral.

Posted by Aditya Raj 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 10 months ago

Atmospheric electricity is the study of electrical charges in the Earth's atmosphere (or that of another planet). The movement of charge between the Earth's surface, the atmosphere, and theionosphere is known as the global atmospheric electrical circuit. Atmospheric electricity is an interdisciplinary topic, involving concepts from electrostatics,atmospheric physics, meteorology and Earth science.