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What is lenz's law

Posted by Mass Nitish 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Riya Sharma 6 years, 3 months ago

It says direction of induced emf is such that it opposes the cause of its production

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ANSWER

To measure resistance voltages ac/dc and check continuity of a given circuit using multimeter

Posted by Anil Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Why repulsion is the surest test for electrification ?

Posted by Muskan Choudhary 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 3 months ago

While electrostatic force of repulsion between two bodies are observed only when they have like charges. That is both the bodies must be charged. Thus, repulsion is the sure test of electrification than attraction.

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a three resistor 2ohm 4ohm and 5ohm are combined in parallel . What is the total resistance of the combination

Posted by Amit Prakash 6 years, 3 months ago

CBSE > Class 12 > Physics

6 answers

Riya Sharma 6 years, 3 months ago

Answer is 20/19

0Thank You

Navjot Kaur 6 years, 3 months ago

20/19 ohm is the right answer according to the formula and also from the pardeep books

1Thank You

Aman Kumar 6 years, 3 months ago

Sry friends but equivalent resistance is :- 1/Req = 1/R1+1/R2+1/R3.........=19/20 ....this what we get answer but friends we also have to reciprocal it as 1/Req is there...so by reciprocal it we get the correct total resistance ...that is 20/19 ......hope u all understand

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Mukesh Jakhar 6 years, 3 months ago

19/20

1Thank You

Divyanshu Mishra 6 years, 3 months ago

Total resistance will be equal to 19/20 Since,resistances are combined in parallel hence total resistance ,R=1/R1+1/R2+1/R3+1/R n SOLUTION: TOTAL RESISTANCE =1/2+1/4+1/5, Lcm=20, Total resistance =10+5+4/20=19/20 If you all friends satisfied with my answer ,Show your satisfaction by giving THANKS by pressing Thanks icon given bottom to my answer

1Thank You

Aman Kumar 6 years, 3 months ago

Total resistance = 20/19 ohm

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How many chap u all completed. In physics

Posted by Nikita Kumari 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Himanshu Arya 6 years, 3 months ago

5 chapter completed

3Thank You

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What is dielectric constant ?

Posted by Rishita Shishir ?✏ 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Rishita Shishir ?✏ 6 years, 3 months ago

Thank u so much

0Thank You

Sia ? 6 years, 3 months ago

Dielectric constant is a quantity measuring the ability of a substance to store electrical energy in an electric field.

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What is meaning of flux =0

Posted by Richa Kumari 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 3 months ago

Electric Flux is zero when the lines or flux of that field going into that surface is equal to flux or lines that are coming out from that same point.

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A square loop ABCD carrying a current i, is places near and coplanar with a long straight conductor XY caarying a current I. Calculate the net force on the loop.

Posted by Poulami Bhadra 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A point charge Q is placed at point o. is the potential difference (vA-vB) positive ,negative or zero if Q is (i) positive (ii)negative

Posted by Kunwar Anubhav Yadav. 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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What is the si unit of electric field

Posted by Jyoti Priya Ayushi Singh 6 years, 3 months ago

CBSE > Class 12 > Physics

6 answers

Padma Tsultim 6 years, 3 months ago

Newtons per coulomb (N/C) or volts per meter (V/m) is the SI unit of electric field.??

1Thank You

Aman Kumar 6 years, 3 months ago

N/C is the S.I unit of Electric field

0Thank You

Akankhya Panda 6 years, 3 months ago

n/c

0Thank You

Poulami Bhadra 6 years, 3 months ago

The S.I unit of E is N/C i.e., Newton/Coulomb or V/m i.e. Volt/metre. The C.G.S unit of E is dyne/esu.

0Thank You

Yogita Ingle 6 years, 3 months ago

The SI units of the electric field are newtons per coulomb (N/C), or volts per meter (V/m). These are derived units where Newton is a unit of force and Coulomb is the unit of charge.

3Thank You

Sia ? 6 years, 3 months ago

The SI unit of electric field strength is newtons per coulomb (N/C) or volts per meter (V/m).

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Derivation of kirchoffs law

Posted by Gopal Tripathi 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A long, straight wire carries a current i. A particle having a positive charge q and mass m, kept at a distance x° from the wire is projected towards it with a speed v. Find the minimum separation between the wire and the particle.

Posted by Narendra Krishnan 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

two tiny sphere carrying charges 2 and -2 placed 40 cm apart.Find the potential and electric field at a point 20cm from the mid point in a plane normal to line passing through mid point

Posted by Adhish Vishwakarma 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How many marks are alloted to practical exams? And What's the percentage of mcqs in board exam?

Posted by Justin Bieber 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Nikita Kumari 6 years, 3 months ago

I think so it 30 marks practical and 20 marks mcqs dear

1Thank You

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State ohm law

Posted by Beckham D Khóngsít 6 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 3 months ago

Same here i was blocked once without any reason

2Thank You

Aman Kumar 6 years, 3 months ago

Nhi aisa nhi hai.....they are blocking without any reason so I m just trying not to talk 4 some time...hope u understand

0Thank You

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 3 months ago

kya aman gayab ho gaye padhai mein kitne gum ho... sorry disturb karne ke liye Tum padhai karo Tumhare time waste ho jayega

1Thank You

Aman Kumar 6 years, 3 months ago

At constant temperature, the potential difference across the ends of the conductor is directly proportional to the current flowing through it.. V=IR,,......Hope this helps??

3Thank You

ANSWER

How to solve Example 1.7 of first chapter ?? class 12

Posted by Jesnan Mossang 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Help me with my physics investigatory project =Investigate the neutral point on axail line by tracing the lines of magnetic field around the bar magnet

Posted by Aaaaastha T 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

SIR single blue print kab tak aega

Posted by Avinash Jha 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Thank you Sia actually mujhe Apna assignment pura karna hai thats why i am asking with you

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Q1 + Q2 =0 what does it signifies

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Adhish Vishwakarma 6 years, 3 months ago

It signifies that q1 and q2 are egual but opposite in sign.

0Thank You

Kshitiz Sharma 6 years, 3 months ago

It signifies that the two charges are eq in magnitude but opp in direction

1Thank You

Sumit Kumar 6 years, 3 months ago

Why are you doing yarrr

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Sia ? 6 years, 3 months ago

This is possible only if q1 and q2 are equal and opposite.

2Thank You

ANSWER

Gausian surface must not pass through any discrete charge , why

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 3 months ago

For a system of charges the Gaussian Surface should not pass through any discrete charge.It is because electric field at the location of any chare is not well defined.However, the Gaussian surface can pass through a continous charge distribution.

2Thank You

ANSWER

Write two pair of perpendicular vectors in the expression of torque =p x e

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Nishu Sahu 6 years, 3 months ago

1. Torque perpendicular to the dipole moment P 2. Torque perpendicular to the electric field E

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Distinguish b/w dipole field and single point charge field

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Nishu Sahu 6 years, 3 months ago

Dipole field is the space around dipole where it infulence can experience when any charge is taken to that point. Single point charge field is the electric field produce by that point charge.

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What happen to the radius of a soap bubble if it is charged

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 3 months ago

The bubble will expand because the charged particles uniformly distributed on it cause them to repel each other due to the electrostatic force.

2Thank You

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Define a point electric dipole

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Sumit Kumar 6 years, 3 months ago

Can we say ideal dipole of point electric dipole

0Thank You

Sia ? 6 years, 3 months ago

An ideal dipole consists of two very very large charges + q and - q seperated by a very very small distance.

1Thank You

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What is the type of symmetric of dipole field

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 6 years, 3 months ago

Line passing through the mid point of the dipole axis and perpendicular to the dipole axis is the line of symmetry of the dipole.

1Thank You

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What is the ratio of strength of electric forces to gravitational forces

Posted by Sumit Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Sumit Kumar 6 years, 3 months ago

I am not understand

0Thank You

Sia ? 6 years, 3 months ago

The magnitudes of the gravitational and electrostatic force are given by,
{tex}F _ { G } = G \frac { m _ { 1 } m _ { 2 } } { r ^ { 2 } }{/tex}
{tex}F _ { E } = k \frac { q _ { 1 } q _ { 2 } } { r ^ { 2 } }{/tex}
So, the ratio is {tex}\frac { F _ { G } } { F _ { E } } = \frac { G m _ { e } ^ { 2 } } { k e ^ { 2 } }{/tex}
where 1/r² has been cancelled.

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Uses of moving coil galvanometer

Posted by Vashu Manshare 6 years, 3 months ago

CBSE > Class 12 > Physics