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What is reverse voltage and reverse current in reverse biasing of pn junction??

Posted by Adarsh Bhagat 6 years, 11 months ago

CBSE > Class 12 > Physics

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Why do we use step up transformer for long distance transmission of A.C. ?

Posted by Chakshu Sharma 2204 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Anna Vthankachan 6 years, 11 months ago

In a step up transformer the number of turns in secondary coil is greater than number of turns in primary coil so the voltage induced get increased due to change in magnetic flux.

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Difference between forward and reverse bias

Posted by Kirthika Vijayan 6 years, 11 months ago

CBSE > Class 12 > Physics

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Amit Yadava 6 years, 11 months ago

In forward bias the +terminal is attached with p type of the junction and in reverse bias p type is connected with the negative terminal

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Definition of electric dipole moment on the basis of torque?

Posted by ????? ???? 6 years, 11 months ago

CBSE > Class 12 > Physics

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write general equation that represents the beta emission

Posted by Malkeet Kaur 6 years, 11 months ago

CBSE > Class 12 > Physics

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When a white ray of light passes through a prism,it os dispersed.why?why does violet colour deviates most but red colour deviates least while dispersed by a prism?

Posted by Chhavi Das 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Nikhil Singh 6 years, 11 months ago

Due to variation in wavelength.

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What is the condition for resonance in L-C-R circuit?what is the impedance of L-C-R circuit in resonance?

Posted by Chhavi Das 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Shubham Sharma 6 years, 11 months ago

For resonance condition , Xc= Xl and z is minimum in that case. Z=√( Xc - Xl)^2. + R^2

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In a plane electromagnetic wave,the electric field oscillates with frequency 20× 10^10Hz and amplitude 48vm_1.a)what is wavelength of the wave? What is amplitude of its magnetic field?

Posted by Chhavi Das 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Arihant Pratap Singh 6 years, 11 months ago

You can use the formula c=v X lambda

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SIunit of magnetic flux

Posted by Happy Aman 6 years, 11 months ago

CBSE > Class 12 > Physics

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Shama Shama Sheikh 6 years, 11 months ago

Tesla meter square is the SI Unit of magnetic Flux

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Which physical quantity unit is faraday? What is the relation of faraday with SI unit of that physical quantity

Posted by Priya Meena 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Shubhankar Kumar 6 years, 11 months ago

Faraday is dimensionless unit of electric charge quantity and equal to approximately 6.02*10^23 electric charge carrier. This is equal to 1 mole , also known as Avogadro number

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How do we obtain a neutral point in the space between two like charges

Posted by Shubham Dhillon 6 years, 11 months ago

CBSE > Class 12 > Physics

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A stright current carriyng conductor is placed horizantally in a uniform magnetic field pointed vertucally downward .What will be the direction of the force experinced by the conductor if their is a current in it from left to right?

Posted by Samreen Sheikh 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Amit Yadava 6 years, 11 months ago

In front or back of the conductor

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Properties of alpha particle beta paticle and gama particle

Posted by Simran Tiwari 6 years, 11 months ago

CBSE > Class 12 > Physics

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Can any one submit me sample paper no.5 of 2019 with solution

Posted by Prisha Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

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What is blue print for 12 for physics

Posted by Akshit Dhanotiya 6 years, 11 months ago

CBSE > Class 12 > Physics

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a short conductor of length 5 cm is placed parallel to a long conductor of length 1.5 m near its center . the conductors carry currents 4 A and 3A respectively in the Same direction. what I'd the total force Experienced by the long conductor. when they are 3 cm apart

Posted by Pavankumar Anand 6 years, 11 months ago

CBSE > Class 12 > Physics

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Relationship between drift velocity amd current electricity

Posted by Rishab Ahuja 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Mansi Sharma 6 years, 11 months ago

I = neAVd. Here Vd is drift velocity ,A is area and I is current?

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electri flux due to a point charge

Posted by Ayush Rathore 6 years, 11 months ago

CBSE > Class 12 > Physics

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Why monopole does not exist??

Posted by Creativity Says 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Ash Thunderbird ✔ 6 years, 11 months ago

First off, this is a hypothetical concept. As it is impossible to have a bar magnet having only one pole. Since when you cut a bar magnet in two, both will form their respective North and South poles.

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How to find which magnet has more strength (given only 2) without introducing third magnet?

Posted by Tushar Burman 6 years, 11 months ago

CBSE > Class 12 > Physics

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Chakshu Sharma 2204 6 years, 11 months ago

Suppose 2 rods are there Move the rod from top to bottom if force remains same at all points than it is not a magnet but if its TOP and BOTTOM ends have strong force than its middle part than that rod is MAGNET .

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Explain why current flows through an ideal capacitor when it is connected to an AC source but not when it is connected to a DC source in a steady state?

Posted by Maniska Das 6 years, 11 months ago

CBSE > Class 12 > Physics