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

Posted by Puneet Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Mathematical relation between magnetic flux and frequency

Posted by Divya Jyoti 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What is absorbent

Posted by Deepak Gola 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Akash Porwal 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 7 years, 1 month ago

F=reamain same

Rounak Gupta 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Hema Bisht 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Akash Porwal 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 7 years, 1 month ago

Plee ans yr

Gudiya Yadav 7 years, 1 month 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 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Which is remarkable optical instrument

Posted by Aman Tirkey 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shivanshu Kulshrestha 7 years, 1 month ago

Human Eye

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

Posted by Gudiya Yadav 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Write two important considerations while fabricating a zener diode

Posted by Sonam Malik 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Nagla Miyan Sefai 7 years, 1 month 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 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Neha ?? 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 7 years, 1 month ago

Meter bridge or optical bench

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Set up relation between current and drift velocity

Posted by Bittu Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kartik Rajput 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What is light vector

Posted by Divyanshu Balaiwar 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Lavesh Bohra 7 years, 1 month 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 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 7 years, 1 month 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.