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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

a charged oil drop is suspended in uniform field of 3×10to the power 4 volt/m so that it neither falls or rises. What will be the charge on the drop if mass of charge is 9.9×10 to the power -15 kg and g= 10 m/s square

Posted by Aditi Pandey 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Ujjawal Yadav 6 years, 4 months ago

Good Question yrr The Net Charges Will be 3.2*10—19 and Electrons Will Be 2

Sudarshan Sharma 6 years, 4 months ago

No of electrons will be 2 and net charge will be 3.2*10 to the power 19

Sudarshan Sharma 6 years, 4 months ago

2

ANSWER

Deduce the expression for electric field due to a system of twi charges q and Q with position vector r1 and r2 at a point r with respect to the common origin

Posted by Piyush Bisht 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

In kirchoffs law however to make equation in a circuit

Posted by Isha Isha 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A comb run through one's hair attracts small bits of paper. What happens, if the hair are wet or it is a rainy day?

Posted by Rashad Khan 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sinchana Malagond 6 years, 4 months ago

The compound attract high because the humidity of atmosphere makes it reducing.

ANSWER

What is effect on capacitance,charge,potential,and energy of capacitor if charge is removed?

Posted by Pappu Buttar 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Any additional book prescribed by cbse board of physics of class 12

Posted by Riya Chaudhary 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Deepak Jindal 6 years, 4 months ago

Arihant

ANSWER

What is value of 1 Coulumb

Posted by Sonu Yadav 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Deepak Jindal 6 years, 4 months ago

6.24×10^18

S.....Sharma☺??? .. 6 years, 4 months ago

1electron=1•6×10^19C Then 1C=1/1•6×10^19

Piyush Bqkshi 6 years, 4 months ago

1

ANSWER

Potentiometer has 5 segments of wire each of length 1 m . A battery is used to pass current through it. It is found the EMF of a cell can be balanced 350 cm from the zero end . Now the battery is connected across the 4 segments of wire . Find the length of potentiometer wire that will balance the EMF of the cell

Posted by Muskan Malik 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Electric field due to charge q near the uncharged conductor

Posted by Nehal Choudhary 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Best physics book for cbse 12 board

Posted by Nehal Choudhary 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Deepak Jindal 6 years, 4 months ago

Ncert

Ujjawal Yadav 6 years, 4 months ago

Behn Ncert padoo

Vysya Company 6 years, 4 months ago

You can use the ncert physics book. For reference purposes you can use SL Arora's physics reference book

ANSWER

The magnetic declination is Greater at higher altitude and smaller near the equator why???

Posted by Sinchana Malagond 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two infinitely long straight parallel wires, '1' and '2', carrying steady currents I1 and I2 in the same direction are separated by a distance d. Obtain the expression for the magnetic field due to the wire '1' acting on wire '2'. Hence find out, with the help of a suitable diagram, the magnitude and direction of this force per unit length on wire '2' due to wire '1'. How does the nature of this force changes if the currents are in opposite direction? Use this expression to define the S.I. unit of current.

Posted by Amit Kumar 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Best reference book for physics?

Posted by Subha Borpatra 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Deepak Jindal 6 years, 4 months ago

Ncert

ANSWER

magnetic field lines between two pole pieces cannot be precisely straight at ends. Some fringing of lines is inevitable. Otherwise ampere's law is violated. What is the meaning of this sentence?? Kindly explain.

Posted by Sinchana Malagond 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

two point charge (+q)and(-2q) are placed at the vertices B and C of an equatorial triangleABC of side a.Obtain the expression for the magnitude as well as the direction of the resultant electric field at the vertex A due to these 2 charges

Posted by Komal Bharti 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why the electric field is convenient but not really necessary

Posted by Pushkar Mishra 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A wire of resistivity ( row) is streached to three times its length. What will be its new resistivity?

Posted by Jagu Doshetty. 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sinchana Malagond 6 years, 4 months ago

The resistivity will be same since resistivity does not depends on the length and dimensions of a wire.Resistivity only depends on the nature of the wire or conductor.

ANSWER

Why the direction of electric field positive to negative

Posted by K@Łp@N@ $Øđh!?? 6 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Deepak Jindal 6 years, 4 months ago

Current always flows from +ve to -ve???????

Rajashekhar Doshetty 6 years, 4 months ago

Current flows from +ve to -ve

Shivam Yadav 6 years, 4 months ago

Because current always flows from positive to negative

Tarsem Mor 6 years, 4 months ago

Because the current always flows from positive to negative

ANSWER

Which extra book is good for board exams?

Posted by Deepak Singh Rautela 6 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Deepak Jindal 6 years, 4 months ago

Ncert??

Sajid Ali 6 years, 4 months ago

For board exam only ncert book is sufficient.

Dependra Singh Sonigra 6 years, 4 months ago

Sl arora for physics and for chemistry mordern abc

Ajay Singh Rajput 6 years, 4 months ago

Modern Abc ,phy ,chem and all ncert books

ANSWER

Define electrostatic potential energy by two charges

Posted by Aniket Singh 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sudarshan Sharma 6 years, 4 months ago

Electrostatic potential energy of a charge is defined as the work done by a external force to bring a charge from infinity (reference point as there potential energy is 0) against the line of force experienced by charge without changing it kinetic energy. Now as there is no net change in kinetic energy so there is no work done by conservative force thus the net force one the particle Is equal to zero it means that external force is equal to the electrostatic force experienced by the charge.

ANSWER

Gauss law numericals

Posted by Méhrâ Bôy 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Where i can get latest cbse sample papers

Posted by Karan Jindal 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Deepak Jindal 6 years, 4 months ago

ONLY ON CBSE SITE????

S.....Sharma☺??? .. 6 years, 4 months ago

Abhi nahi aaya h 12th ka sample paper

A Malavika 6 years, 4 months ago

At the cbse website

ANSWER

Derive electric potential inside a non conducting a sphere.

Posted by S Raj 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Devilal Lohar 6 years, 4 months ago

G

ANSWER

Can we change the stream in class 12 from science to commerce...

Posted by Mahiman Prajapati 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Karan Jindal 6 years, 4 months ago

Yes you can change but you may find difficulty to understand topics

Akash Choudhary Dav Gandhinagar 6 years, 4 months ago

Yes in my skl many stds changes

ANSWER

Free Pithball of 10 gram carries a positive charge of 5×10^-8 coulomb what will be the nature and magnitude of the charge that should be given to the another Pithball Q fixed 7 CM below the formal ball so that the upper ball stationary

Posted by Sumer Choudhary 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 4 months ago

ANSWER

How to pass compartment in physics?

Posted by Abhishek Sharma 6 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Karan Jindal 6 years, 4 months ago

Prepare for first four units and semicoductors

Rajat Solanki 6 years, 4 months ago

Padhai krke ....?

Prashant Maurya 6 years, 4 months ago

Only focus on ncert read ncert 5 to 6

Mahiman Prajapati 6 years, 4 months ago

Be update with cbse guidelines and focus only on ncert books...

ANSWER

Why charge cannot exist without mass but mass can exist without charge

Posted by Khushi Pargain 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 4 months ago

Charge cannot exist without mass but mass can exist without charge because it is a property of mass that the charge is always associated with mass.

ANSWER

To find the current

Posted by Pritha Biswas 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Pranjal Monga 6 years, 4 months ago

Current = charge /time

ANSWER

A cell has an emf of 1.68V and internal resistance 350ohm. What can be maximum current drawn from the cell?

Posted by Sirat Sidhu 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

2. Rarer to denser, Convex SRS (Virtual Image)

Posted by Saman Panag 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Page 237 of 739

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App