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a parallel plate capacitor is charged by a battery after sometime the battery is connected and a dielectric slab with its thickness equal to the plates separated is inserted between the plates what change in any will take place in charge on the plates electric field intensity capacitance of the capacitor potential difference and energy stored in the capacitor

Posted by Muskan Purohit 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Vishal M 4 years, 5 months ago

B

ANSWER

An electron is placed at the center of a charge ring with charge q of radius r .if electron is made displace slightly on axis of ring then what will be the angular frequency of electron

Posted by Himanshi Rajput 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is derivation of capacitance of a cylindrical capacitor is included in the syllabus of class 12th cbse for 2021-22 ?

Posted by Shrestha Pal 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Yash Phougat 4 years, 5 months ago

Yesss

Arman Gupta 4 years, 5 months ago

I think it not included

Nik . 4 years, 5 months ago

Yes

ANSWER

What are the factors affecting refractive index

Posted by Nik . 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Black Panther 4 years, 4 months ago

Velocity, intensity of light and temp., Lamda(wavelength)

Nik . 4 years, 4 months ago

.

Shivam Pal 4 years, 5 months ago

Temperature , wavelength of light

ANSWER

An electric dipole consists of charges +-2×10^8C seperated by a long distance of 2mm.it is placed near a long line charge of density 4×10^-4cm^-1 as shown in the figure such that the negative is at a distance of 2cm from the line charge.calculate the force acting on the dipole.

Posted by Ankita Chatterjee 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How can I remember the formulas of physics

Posted by Khilendra Sahu 4 years, 5 months ago

CBSE > Class 12 > Physics

4 answers

Khilendra Sahu 4 years, 4 months ago

Thanks to all

Rahul Kumar Keshri 4 years, 5 months ago

Theory padhne se sath sath formula ko bhi yaad karte jao aur samajh kr yaad karo...

Ashutosh Tiwari 4 years, 5 months ago

Make a formula Dairy of those subjects that are hard for you and revise them constistency

Nik . 4 years, 5 months ago

Make a special note of formula only and provide 10-15 minute daily on learning it

ANSWER

Define quantisation of charge and relative permittivity with formula

Posted by Renu Taneja 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the cause of electromagnetic waves?

Posted by Pk .. 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Rahul Kumar Keshri 4 years, 5 months ago

Due to accelerating charge particle..

Anuradha Patwari 4 years, 5 months ago

Correct answer

Nidhi Bharti 4 years, 5 months ago

Oscillating electric field And magnetic field perpendicular to each other, leads to the electromagnetic wave formation.

ANSWER

Two charges of equal magnitudes kept at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, what is the new force acting on each charge

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

5 answers

Nidhi Bharti 4 years, 5 months ago

F/16

Nikita Chauhan 4 years, 5 months ago

Force remains same

Srijan Saxena 4 years, 5 months ago

Force will remain same

Anuradha Patwari 4 years, 5 months ago

4 time

Anurag Saral 4 years, 5 months ago

Force when magnitude of charge is same F=q^2/4(pi)(Eo)r^2 if charges are halved and distance is doubled then F=q^2/64(pi)(Eo)r^2

ANSWER

Four equal charges q are placed at the four comers A, B, C, D of a square of length a. The magnitude of the force on the charge at B is ?

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Anuradha Patwari 4 years, 5 months ago

F=Qq/ r2

ANSWER

Plot a graph showing the variation of coulomb force (f) versus (1/ r2) where r is the distance between two charges of each pair of charges ( 1µC, 2 µC) and (2 µC , -3 µC). Interpret the graph obtained

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate the magnitude of electric force between a electron and a proton at a distance of r= 5.29 x 10 -11 m.

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Bagga 4 years, 5 months ago

4.35×10^-18

ANSWER

When two objects are rubbed with each other, approximately a charge of 50 nC can be produced in each object. Calculate the number of electrons that must be transferred to produce this charge.

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Bagga 4 years, 5 months ago

q=50nC e=1.6×10^-19 n=? q=ne n=no. Of electrons

ANSWER

Three-point charges as shown in the figure below. What is the magnitude of Coulomb force experienced by Charge B (k = 9.109 N.m2.C-2; 1 μC = 10-6 C).

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Three point charges as shown in figure below. What is the magnitude of the static electric force at point A (k = 9.109 N.m2.C-2; 1 μ = 10-6)

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two identical objects, separated by a distance d, with charges equal in magnitude but of opposite signs exert a force of attraction of - 2.5 N on each other. What force do these objects exert on each other if the distance between them becomes 2d?

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Bagga 4 years, 5 months ago

Why can't u solve such simple questions? Only formula is required in this question. Read it carefully everything is given in the question

ANSWER

A positive charge q exerts a force of magnitude - 0.20 N on another charge - 2q. Find the magnitude of each charge if the distance separating them is equal to 50 cm.

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

The force that q exert on 2q is given by Coulomb's law:

F = k (q) ( - 2q) / r²,
r = 0.5 m,
F = - 0.20 N,

- 0.2 = - 2 q² k / 0.52

q² = 0.2 × 0.52 / (2k)

q = √ [(0.2 × 0.52 / (2 × 9 × 109)]

= 1.66 × 10^-6 C

q = 1.66 × 10^-6 C,

-2 q = -3.23 × 10^-6 C

ANSWER

What is the net force and its direction that the charges at the vertices A and C of the right triangle ABC exert on the charge in vertex B?

Posted by Rachita T 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The magnitude of the charges on three identical balls, A, B and C is in the ratio of 1:3:7. The charges on A and B are positive and the charge on ‘C’ is -1.4 x 10-7 C. Calculate (1) charge on A and B. (ii) charge on each when they were brought in contact and then separated.

Posted by Smiley __ 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Mradul Gupta 4 years, 5 months ago

Hey friends I have created a channel in telegram there we will solve the doubts of every one so please fastly It is the link https://t.me/joinchat/5ZTKf9lCvfsxNWI1

Mradul Gupta 4 years, 5 months ago

Charge on A is - 0.2×10^(-7)C Charge on B is - 0.6×10^(-7)C Charge on each after separation is -0.2×10^(-7)C If you want to see the solution then click on the link https://drive.google.com/file/d/1Il7W29znr9C0RmPqrVcwC_H6NH5URNQp/view?usp=drivesdk

Arman Gupta 4 years, 5 months ago

(A) LET CHARGES ON A, B AND C BE X, 3X AND 7X . BUT IT IS GIVEN THAT 7X = -1.4 x 10-7 C So it comes out that X=0.2x 10-7 C Then 3X = 0.6x 10-7 IT IS ALSO GIVEN THAT CHARGES ON A AND B ARE POSITIVE. SO CHARGES ON A, B AND C ARE 0.2x 10-7 C , 0.6x 10-7 C AND -1.4x 10-7 C (B) ON BRING IN CONTACT TOTAL CHARGE IS (0.2+0.6-1.4)x 10-7 C WHICH IS EQUAL TO -0.6x 10-7 C THIS CHARHE WILL BE EQUALLY DISTRIBUTED ON EACH BALL. SO CHARGE ON EACH BALL WILL BE (-0.6x 10-7)/3 = -0.2x 10-7

ANSWER

Please suggest me best topic for project file

Posted by Shagun Deep Rathore 4 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Nik . 4 years, 5 months ago

Telescope

@ M 4 years, 5 months ago

potentiometer, Meterbridge Microscope, telescope, Rectifier

ANSWER

In chapter alternating current, when applied voltage is equal to back emf it means net voltage is zero, consequently current should also be zero but it is not zero. Why?

Posted by Ruchi Tiwary 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

बेबि बीच 4 years, 5 months ago

The net voltage is 0 all the times but not the instantaneous. It's flutuating and so is the current. A one moment is + ve and other -ve so that net V becomes 0. Same is valid for current.

ANSWER

What is the unit of electric flux

Posted by Shivam Thakur 4 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Nik . 4 years, 5 months ago

Volt meter

Mehardeep Kaur 4 years, 5 months ago

Symbol used for electric flux is phi and it's SI unit is volt metres

ANSWER

An electron moves in a circle with uniform speed in a stationary magnetic field normal to the circle.if the field magnitude is made to increase with time, will the electron speed up or speed down? Will it continue to revolve in the same circle????

Posted by Kirti Sharma? 4 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Nik . 4 years, 5 months ago

A

Piyush Gupta 4 years, 5 months ago

Its speed remains constant only it's direction will chaange

ANSWER

A particle of mass 1kg slides down a track shown in figure. Part BC of the track is circular with radius R = 10m. Part DC the track is rough with coefficient of kinetic friction = 0.2. what is the total force acting on the particles when it has just passed point D

Posted by Nisha Yadav 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Eight identical point charges of q coulomb each are placed at the corners of a cube of each 0.1m . Calculate electric field at centre when one of the corner charges is removed

Posted by Diksha Sharma 4 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Nik . 4 years, 5 months ago

Did you remember me diku sis

Nik . 4 years, 5 months ago

Hi diku

ANSWER

Force due to chrge on centroid of equilateral triangle

Posted by Sahil Rawat 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Anurag Saral 4 years, 5 months ago

0

@ M 4 years, 5 months ago

O

Piyush Gupta 4 years, 5 months ago

Zero

ANSWER

Deleted portion from chapter nuclei

Posted by Spurti . 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

https://mycbseguide.com/dashboard/content/21181

ANSWER

In how much time you will give answer

Posted by Yuvraj Rasal 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Anurag Saral 4 years, 5 months ago

lol

ANSWER

Figure shows three point charges, +2q, -q and + 3q. Two charges +2q and -q are enclosed 7 within a surface ‘S’. What is the electric flux due to this configuration through the surface ‘S’?

Posted by Himanshu Gupta 4 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Lalit Jakhar 4 years, 5 months ago

q/E0

ANSWER

Q value is in syllabus of chapter nuclei ?????

Posted by Spurti . 4 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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