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

Change in electric potential energy is defined as the work done by external force to bring a charge or a charged body from one point to another point in an electric field . Potential energy is defined as the work done by external force to bring a charge or a charged body from infinity to a point in an electric field.

0Thank You

ANSWER

What is physical significance of electric dipole in 200 words

Posted by Yuvaraj Singh Thakur 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 3 months ago

I will not be able to describe in exact 200 words. Some phenomenon related to dipole examples are ,polarity of water and ionic molecules., Polarisation of dielectrics , .

1Thank You

ANSWER

In 2018- 019 deleted topics in class 12th physics

Posted by Yuvaraj Singh Thakur 7 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Abhi Lal 7 years, 3 months ago

The use of galvanometer is to be detection and measuring electric current

0Thank You

Rahul Chauhan 7 years, 3 months ago

U can get it from google

0Thank You

Lavi Didi 7 years, 3 months ago

What is the use of galvnometer

0Thank You

ANSWER

Explain reason for why resistance increase in metals and decrease in non metal when temperature increase

Posted by Shivam Pandit 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Aviral Upadhyay 7 years, 3 months ago

In metals there are free electrons.when we increase the temperature of the metals free electrons moves in random direction and collide with other electrons .hence the speed of electrons get reduced.as we know flow of electrons forms current and if we reduces the speed of electrons then current also decreases.Hence Resistance increases.

0Thank You

ANSWER

Does the CBSE ask questions in the board from additional exercise?

Posted by Niharika Srivastav 7 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Rahul Chauhan 7 years, 3 months ago

0Thank You

Ravi Sharma 7 years, 3 months ago

0Thank You

Ransingh Mor 7 years, 3 months ago

Yes ...

1Thank You

ANSWER

What is the ohm law

Posted by Priya Krishna 7 years, 3 months ago

CBSE > Class 12 > Physics

5 answers

Ravi Sharma 7 years, 3 months ago

Ohms law is sohams law

0Thank You

Abhi Lal 7 years, 3 months ago

According to ohms law potential difference (v) is directly proportional to the current (I)

0Thank You

Rishabh Sahu 7 years, 3 months ago

Original ohms law J= σ E j,j is current density E is electric field σ is conductivity. V=IR is derieved form of ohms law used in ohmic conductors (ie which follow ohm's law) V is potential difference i is current R is resistance.

0Thank You

Ravi Kumar 7 years, 3 months ago

The potential difference (voltage) across an ideal conductor is proportional to the current through it. Ohm's Law is given by: V = I R where V is the potential difference between two points which include a resistance R.

1Thank You

Sakshi Srivastav 7 years, 3 months ago

At constant temperature current is directly proportional to potential difference is k/as ohm law

1Thank You

ANSWER

In which month, school will complete whole class11 syllabus?

Posted by A B 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

According to ohm law , as current increases then potential difference(voltage) also increases but according to e.mf and voltage relation i.e V=E.mf_I×r Here V=potential difference I=current r=internal resistance According to above relation As current increases then potential difference voltage decreases How it is , iam confused ,please help me

Posted by Shivam Pandit 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

when an alpha particle is projected vertically upwardin a region where magnetic field is directed from south to north .find the direction of current

Posted by Amisha Gartan 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

two cells E1 and E2 have an e.m.f of 5v and 9v and internal resistance 0.3 ohm and 1.2 ohm respectively calculate the value of current flowing through the resistance of 3 ohm

Posted by Ashish Biresh Thakur 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Whqt is fringing in parallel plate capacitor....

Posted by H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate the charge of a copper particle of mass 300mg if 0.1%of the electron are removed from it

Posted by Neha Gupta 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

M Karim Ohm's law question number 14

Posted by Ritik Rosan 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is this electric field

Posted by Ritik Rosan 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Suryansh Jain 7 years, 3 months ago

The field or region where its influence can be felt

0Thank You

ANSWER

HC Verma chapter 31 capacitors ques no 42

Posted by Kaushik Vishwakarma 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 3 months ago

You must write question..

1Thank You

ANSWER

Why we had to take off airflights on different airports when we travel a long journey by aeroplanes like india to america?????

Posted by Rahul Chauhan 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is ohm,s law

Posted by Rohit Giri 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Ap Kumar 7 years, 3 months ago

At constant temperature the current produced in a conducte is directly proportional to its applied potential difference

1Thank You

ANSWER

Which is best book for boards and jee mains in class 12th cbse physics,maths and chemistry???

Posted by Ritesh Gajjar 5 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Tannya Pande 7 years, 3 months ago

RS Agarwal and pradeeps is good .???☺?

0Thank You

Shivam Rai 7 years, 3 months ago

Firstly for all competetive and boards ncert is best then other books like tmh publicatipn for maths nd hcv for physics

0Thank You

Ap Kumar 7 years, 3 months ago

For math RD Sharma is the best in chemistry comprehensive chemistry and other IIT level book is the best for physics PRADEEP'S Physics and other IIT books is the best

0Thank You

Subham Anand 7 years, 3 months ago

Rs agrwall nd rd Sharma

2Thank You

ANSWER

In which way kirchoff 2nd law if loop or voltage is based on conservation of energy

Posted by Shivam Pandit 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 3 months ago

I don't think it's true . It is based on the principle that work done by a conservative ( in this case electrostatic force) in a closed loop is 0.

1Thank You

ANSWER

Why should a circuit containing capacitors be handled cautiously, even when there is no current?????

Posted by Tannya Pande 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Manjushree Hiremat 7 years, 3 months ago

when the capacitor will b charged completely flow of current stops. after u remove the battery current stops flowing and if u connect resistor to the capacitor the energy stored in capacitor will discharge to resistor but a bit of energy can b stored in capacitor which can kill u if it discharges through u. In other case the resistor fails to work sometime then d energy flows through user . I think dis is d answer . tq

2Thank You

ANSWER

Why resistance increase in series and decrease parallel

Posted by Rahul Singh 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Abhinav Kalaliya 7 years, 3 months ago

In series length increase However In parallel area increase

5Thank You

ANSWER

A person suffering from myopia can see an object up to 2 cm. Find the focal length and power of lens.

Posted by Ravi Prakash 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is torque?

Posted by Himanshu Narwal 7 years, 3 months ago

CBSE > Class 12 > Physics

5 answers

Rishabh Sahu 7 years, 3 months ago

Torque of a force about a point is defined as the product of force acting on the body multiplied by the perpendicular distance of the point from the point of application of force. It is a vector cross product.

2Thank You

Saloni S 5 years, 4 months ago

In rotational movement the force which acts on the object is known as TORQUE

3Thank You

Harkirat Singh 7 years, 3 months ago

Ya bro... Sl arora se dekh la

0Thank You

Shivam Pandit 7 years, 3 months ago

Turning effect of force is known as torque

0Thank You

Suryansh Jain 7 years, 3 months ago

Book m dekh le bhai