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

Because the magnet always show north south direction..... And magnet is fitted in the compass. In such Aa way that it will show N S direction.thus we can find east and west direction.

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Earth's magnetism definition

Posted by Anadi Ojha 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Satyam Ranjan 7 years, 2 months ago

Earths magnetic field is a magnetic dipole similar to that of bar magnet tilted 11° from earths axis of rotation

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Consider three charges q1,q2,q3 each equal to q at the vertices of an equilateral triangle of side l.What is the force on a charge Q(with the same sign as q) placed at the centroid of the triangle?

Posted by Jitesh Kumar 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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What is principle of superposition?

Posted by Debi Prasad Rath 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 2 months ago

Net effect is the sum of individual effects and each individual effect is independent of other effect. Example take effect as electric field due to a point charge at a point.

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What is the line of symmetry of a dipole field

Posted by Muskan Verma 7 years, 2 months ago

CBSE > Class 12 > Physics

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Is snell's law used anywhere? if yes then explain

Posted by Muzahid Khan 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Give examples of ohmic and non ohmic circuit elements.

Posted by Debasmita Jamuda 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Electro magnetic imporatant question

Posted by Arun Ambiger 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Explain continous charge distribution

Posted by Riya Roshni 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Proof of 1 tesla =10000 gauss

Posted by Sayna Barnwal 7 years, 2 months ago

CBSE > Class 12 > Physics

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An object of height 1.2cm is placed before a concave mirror of focal length 50cm so that a real image is formed at a distance of 60 cm from it find the position of an object what will be the height of image formed

Posted by Hunny Dahia 7 years, 2 months ago

CBSE > Class 12 > Physics

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when two registers are connected in series with a cell of EMF 2v and neglecting internal resistance, a current of 2/5 A flows in the circuit. when the registers are connected in parallel the main current is 5/3 A. calculate the resistances

Posted by Rajesab Saidusab 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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What is the symbol of current

Posted by Saurabh Kumar 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Komalpreet Kaur 7 years, 2 months ago

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What is the amount of work done in moving 100 micro coulomb charge between two points 5 cm apart on and equipotential surface

Posted by P Sa 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Monika Singh 7 years, 2 months ago

Hence potential at every point is same on equipotential surface so work done in moving any charge on its surface is 0

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Two capacitors of capacitance of 6 microfarad and 12 microfarad are connected in series with a battery.The voltage across the 6 microfarad capacitor is 2V.compute the total battery voltage.

Posted by Sulakshana Singh 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Shubham Sharma 7 years, 2 months ago

3 V

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What charge would be required to electrify a sphere of radius 25cm so as to get a surface charge density of 3/180/cm2

Posted by Adarsh Pandey 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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hello friends I have a small doubt in physics please clear me the answer and my question is if five 100 Watts bulbs are used for 4 hours a day the current bill in the month of June at the rate of Rs 4 per unit will be

Posted by Shaista Parveen 7 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Prithwiraj Choudhuri 7 years, 2 months ago

Read cirrent as current

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Prithwiraj Choudhuri 7 years, 2 months ago

(5*100*4*30*4)/1000=240 per month. Please read the cirrent electricity thoroughly.

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Why electric field lines does not for closed loop?

Posted by Mona Dem 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Find the ratio between the wavelengths of the 'most energetic' spectral lines in the Balmer and Paschen series of the hydrogen spectrum.

Posted by Aditi Yadav 7 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

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Cause of super conductivity

Posted by Siddhartha Pandey 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Monika Singh 7 years, 2 months ago

In metals resistance depend on temperature.it decreases with decrease in temperature .when the temp becomes 0 the resistance almost become 0 so maximum current can flow through it and at that time the conducror is said to be of super conductivity

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what are the limitations of Gauss Law?

Posted by Vishwajeet Raj 7 years, 2 months ago

CBSE > Class 12 > Physics

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Detivation of magnetic field due to a circular current carrying coil

Posted by Mohit Bhandari 7 years, 2 months ago

CBSE > Class 12 > Physics

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What is meant by resistivity

Posted by Gargee Mishra 7 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Aisha Gupta 7 years, 2 months ago

In basic it is a special property of resistance. And it is const of proportionality too

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qA=5uc,qB=-15uc,qC=-5uc and qD=15uc are placed at the corners of a square of size 25cm.Find the net force acting on charge of 1uc placed at the centre of it.

Posted by Akansha Varshney 7 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Shubham Sharma 7 years, 2 months ago

The charges at diagonally opposite end of the square are equal and opposite . so, the force exerted by these charges at the centre of square will be equal and opposite and thus will cancel each other making net force = 0

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Akansha Varshney 7 years, 2 months ago

Pls solve this ques

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Shubham Sharma 7 years, 2 months ago

Zero

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Explain the variation of conductivity with temperature for a metallic and ionic conductor

Posted by Sanyogita Yadav 7 years, 2 months ago

CBSE > Class 12 > Physics