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

In series the effective resistanc increases while in parallel effective resistance decreases. If We want to make a circuit with greater potential we connect the resistance in series while if we want to make a circuit in which maximum current is flowing then the resistance connect in parallel

0Thank You

ANSWER

What happened when we earthed the charge to earth

Posted by Aryan Kumar 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Riya Gupta 7 years, 3 months ago

All the charge goes down to the earth ???

4Thank You

Samiksha Saxenna 7 years, 3 months ago

The potential difference becomes zero

3Thank You

ANSWER

What happen to capacitor if dielectric between it is vacuum.

Posted by Pintu Narula 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Prikshit Singal 7 years, 3 months ago

Dielectric constant for vaccum is 1 Then capacitance will be E○A/d

0Thank You

Amr Jas 7 years, 3 months ago

Its capacitance increase at infinty

2Thank You

ANSWER

A piece of polythene is rubbed with wool and it has been found to acquire a negative charge of 3×10^7 is there a transfer of mass from wool to polythene ? If yes how much

Posted by Tara Choudhary 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Pintu Narula 7 years, 3 months ago

Yes but negligible

0Thank You

ANSWER

Why dipole moment has direction from negative to positive?

Posted by Harsh Bansal 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Saurav Sharma 7 years, 3 months ago

It is convection thatswhy its direction -ve to +ve

2Thank You

Harsh Sekhon 7 years, 3 months ago

Due to property of light weight of electrons than protons.

3Thank You

ANSWER

Polarization of dielectric

Posted by Neha Ramna 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Dipanshu Bokade 7 years, 3 months ago

If a material contains polar molecules, they will generally be in random orientations when no electric field is applied. An applied electric field will polarize the material by orienting the dipole moments of polar molecules.

1Thank You

ANSWER

Parallel plates capacitor's principle

Posted by Riya Gupta 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Saloni S 7 years, 3 months ago

C=A£0/D farad

0Thank You

ANSWER

How does the coloumbs force between two point charges depend upon the dielectric constant of interwaving medium

Posted by Raj Kishore 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Rakhi Pundir 7 years, 3 months ago

Its not Fair Its Fvaccum

1Thank You

Aachal Gupta 7 years, 3 months ago

The electrostatic forces between two charges are dependent on medium in which two charges are placed ie,Fmed = Fair÷k

2Thank You

ANSWER

Son is observing his image as well as his father image find the length of mirror used by son in observing both image

Posted by Sneh Lata 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is equepotential surface

Posted by Aditya Kumar 7 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Aditya Kumar 7 years, 3 months ago

how will u define a time....?

0Thank You

Aachal Gupta 7 years, 3 months ago

Equipotential surface are those at which potential is same.

2Thank You

Rishabh Sahu 7 years, 3 months ago

A surface over which on moving a charge the work done by electrostatic or external force is 0.

3Thank You

ANSWER

But.tech.entrence exam. Question paper

Posted by Suyasha Singh 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A man is in the insulating mettalic cage does not experience any shock when a high potential is applied on the insulating mettalic cage? Why?

Posted by Simran Virk 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Manjot Gill 7 years, 3 months ago

This is simply due to this reason = The charge inside the insulating metallic cage is zero ,,,so, he doesn't experience any shock

0Thank You

Septima Ravenclaw 7 years, 3 months ago

It is because of electron shielding

2Thank You

ANSWER

Property of scattering

Posted by Vipul Sirohi 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Posted by Kriti Mishra 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why bulb with lowest power glow with maximum brightness

Posted by Samar Singhai 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

In the given fig. Calculate the force on the charge Q kept at O which is middle point of the AB

Posted by Raunak Mohan 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Septima Ravenclaw 7 years, 3 months ago

Where is the figure

0Thank You

ANSWER

A point charge q1=2micro coulomb is located at points A(2m,1m) and another point charge q2=-5micro coulomb is located at points B(-2m,4m) .find the force exerted by q1 on q2

Posted by Abhinav Kumar 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Charge distribution with expression

Posted by Nikki Kannauj 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is an ideal dipole

Posted by Happy Yadav 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Mohd Ashar Khan 7 years, 3 months ago

In which 2a tends to 0 and q tends to infinity.

1Thank You

ANSWER

A metallic sphere of radius R has charge Q. Find its potential

Posted by Pranjal Rajput 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Uday Pratap 7 years, 3 months ago

Inside and surface v=Q/(4π€°R)

0Thank You

ANSWER

Find the minimum number of cells required to produce an electric current of 1.5 ampere through a resistance of 30 ohm. Given the EMF and internal resistance of each cell are 1.5 voltage and 1.0 ohm respectively.

Posted by Shivangi Posti 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Ketaki T 5 years ago

jajs

2Thank You

ANSWER

Electric field is a conservative field. Prove

Posted by Anjali Dabas 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive an expression for electic potential at any point due to an electric dipole?

Posted by Amrinder Singh 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two identical point charges 'Q' are kept at a distance of 'r' from each other. A third point charge is placed on the line joining the above two charges such that all the three charges are in equilibrium. Calculate the magnitude and location of the charge

Posted by Shubi Seniaray 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Hi friends I do not able to clear jee mains examination. Please help me ,what to do now!!!!!

Posted by Jyoti Kumari 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 3 months ago

What is actually your aim ,IIT , a local college ,or just any profession for a job? Your further course of action depends on it . If you think that there is no other field than engineering then you were wrong . There are still many fields other than engineering and if required you may choose them. If you want you may go for a second attempt only if engineering really means a lot to you. IIT seems very tough target for one who is unable to clear jee main . Still if you think you can work hard to extreme level then no goal is unachievable.

1Thank You

ANSWER

A current I is flowing in a infinitely long metallic conductor bent into the form as shown in the figure. If the radius of the curved path is r, find the magnetic field at centre O.

Posted by Romaree Basumatary 7 years, 3 months ago

CBSE > Class 12 > Physics