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The coil is laminated to reduce these to a minimum as they interfere with the efficient transform of energy from the primary coil to the secondary one. The eddy currents cause energy to be lost from the transformer as they heat up the core - meaning that electrical energy is being wasted as unwanted heat energy.

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The ac current gain B of a transistor is 150 wath Will be charge in collector current for a change of 100

Posted by Abhishek Mishra 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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Deteemine the current in each branch of the network shown in fig

Posted by Sheetal Yadav 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Deepak Jindal 6 years, 4 months ago

Where is the figure to determine the current........??????????????????????

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When a potential difference is applied across the end of a conductor, how the drift velocity of the electron related to the relaxation time?

Posted by Sataybir Sataybir 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Gagan Thakur 6 years, 4 months ago

E=neAVR Where n is no. Of electrons per unit volume ,e is charge on electron,A is the cross section area, V be the drift velocity,R be the resistance across it and E be the potential difference

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For the same value of the angle of incidence the angles of refraction in the media A, B and C are 15°, 25° and 35°respectively. in which medium would it be the velocity of light minimum ?give reason to ur ans?

Posted by Harshi Rajput 6 years, 4 months ago

CBSE > Class 12 > Physics

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Why ohm's law is not followed by metallic conductors.....??????

Posted by Prakhar J 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Deepak Jindal 6 years, 4 months ago

Some metals are ohmic devices and some are non ohmic devices.....??????

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▪▪Amrit▪▪ ❤ 6 years, 4 months ago

some metals are linear called ohmic devices but some are non linear called non ohmic devices or metals

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Dimensional formulae of E°

Posted by Shubham Yadav 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Deepak Jindal 6 years, 4 months ago

M-1 L-3 T-4 A-2

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Sinchana Malagond 6 years, 4 months ago

I hope you know the derivation part.

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Sinchana Malagond 6 years, 4 months ago

M-1 L-3 T4 A2

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Why coffee making mechines boil milk rapedly

Posted by Umang Chauhan 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

▪▪Amrit▪▪ ❤ 6 years, 4 months ago

from which chapter

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What is conductor, insulator or semiconductor with examples

Posted by Kalash Jain 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

@Мɑи?? Şıиɢђ?? 6 years, 4 months ago

Conductors are generally substances which have the property to pass different types of energy. In the following, the conductivity of electricity is the value of interest. examples are metals, aqueous solutions of salts (i.e., ionic compounds dissolved in water), graphite etc. Insulators possess no free charge carriers and thus are non-conductive. examples areplastics, Styrofoam, paper, rubber, glass and dry air. Semiconductors are solids whose conductivity lies between the conductivity of conductors and insulators. examples are silicon, germanium, antimony, arsenic, boron, carbon etc.

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How can uh say that electric field is constant when we derive drieft velocity

Posted by Tripti Kukreti 6 years, 4 months ago

CBSE > Class 12 > Physics

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इलेक्ट्रोस्टेटिक फील्ड लाइंस कन्नौट बे डिस्कंटीन्यूअस फाई वेरी शॉर्ट आंसर टाइप क्वेश्चन

Posted by Ramkrishna Kumar 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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:-)Chapters that are important for studying electrostatics or chapters which are usually useful in this chapter?

Posted by Mohit Yadav 6 years, 4 months ago

CBSE > Class 12 > Physics

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The electric field at 2R from the centre of a uniformly charged non conducting sphere of radius R is E. The electric field at a distance R/2 from the centre?

Posted by Shreya Srivastava 6 years, 4 months ago

CBSE > Class 12 > Physics

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what is direction of dipole moment

Posted by Tarun Shukla 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Deepak Jindal 6 years, 4 months ago

Nehative to positive

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Dhruv Rajput 6 years, 4 months ago

-ve to +ve

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Two bodies A and B carry charges -3.00 micro coulomb and -4.00 micro coulomb. How many electrons should be transferred from A to B so that they acquire equal charges?

Posted by Kiran Khichi 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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Why does a magnet attract specific objects?

Posted by Shobikaa Ravikumar 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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During double slit experiment, does an electron split into two or something different happens. If electron splits then how. But it is outlawing conservation of energy right ?

Posted by Bishal Chakraborty 6 years, 4 months ago

CBSE > Class 12 > Physics

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Why there is no work done in moving a charge fromone point to another on an equipotential surface

Posted by Ankit Kapil 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Tripti Kukreti 6 years, 4 months ago

Because in equipotential surface ,potential is same or equal everywhere, And we know potential=w÷q

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Sudah Firdous 6 years, 4 months ago

We know that,the change in potenial of a body on any point on the equipotential surface is constant. work done per unit charge is the change is potential. Since,in the equipotential surface,change in potential is zero. Therefore work done on the equipotential surface is zero.

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5 balls 1, 2, 3, 4, 5 1-2, 2-3, 3-1 all show attraction 2-4, 3-5 show repulsion Then charge on ball 1 is:- Give answer with explanation

Posted by Mohit Yadav 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Mohit Yadav 6 years, 4 months ago

The question is not incorrect because this is a jee mains examination question

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Shobikaa Ravikumar 6 years, 4 months ago

The question is incorrect. Bcoz the balls can attract and repel each other only if they have opposite charges. But 1 shows attraction to both the opposite charges. Moreover if they are neutral they could not attract and repel each other.

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Sinchana Malagond 6 years, 4 months ago

Its nuetral. Try doing +ve and -ve matches of the given pairs. You'll find that the ball 1 turns out to be attracting both +ve ans -ve charge. Try out.

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Derive an expression for the equivalent capacitance when 3condensers connected in series

Posted by Priyabrata Pradhan 6 years, 4 months ago

CBSE > Class 12 > Physics