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

Because as it has infinite resistance so there is zero current pass through it which leads to accurate reading of current value............. otherwise if galvanometer has non infinite resistance then some current also pass through it hence there is some error in reading

1Thank You

Abneesh Jaswal 7 years, 1 month ago

Pta nii yrr

2Thank You

ANSWER

Can two +ve charge of different size attract each other?

Posted by Himanshu Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

7 answers

Chandra Sree Gandhavarapu 7 years, 1 month ago

Yes in the case of charge mass doesnt matters the amount of charge which matters

0Thank You

Lipika Yadav 7 years, 1 month ago

Yes, if the difference between their sizes is very very large

0Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 1 month ago

Nothing is impossible

0Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 1 month ago

Let consider a body with very small +ve charge and another body of very large +ve charge in this case second body induces -ve charge in first body and attract it

1Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 1 month ago

Yes it can be possible

0Thank You

Abneesh Jaswal 7 years, 1 month ago

Never

0Thank You

Kanchan Lata 7 years, 1 month ago

0Thank You

ANSWER

How to prove potential inside conductor is zero?

Posted by Robert Longjam 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Manish Yadav 7 years, 1 month ago

as we know that Electric field inside a cinductor is zero i.e. E= 0 now using formula | E | = dv/dt puting E. = 0 we get dv = 0 i.e. potential inside a conductor is zero.

0Thank You

ANSWER

What is amperian loop and what is its contribution or use

Posted by Sarmy And Singh Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Manish Yadav 7 years, 1 month ago

An ampherian loop is just an eaisy way to find magnetic field in comparision to biot savart law

0Thank You

ANSWER

What are advantage and disadvantages of electric field

Posted by Gurmeet Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Chandra Sree Gandhavarapu 7 years, 1 month ago

Electric field is used to study the property of charged particles

0Thank You

Manish Yadav 7 years, 1 month ago

it has a no. of use it help us to explain many things like electric field inside a conductor is zero, it makes a charge particle to take a curve path and a lot more

1Thank You

ANSWER

Why there is only two type of charges and why we call it -ve and +ve

Posted by Himanshu Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Abneesh Jaswal 7 years, 1 month ago

Only newton know this

0Thank You

Manish Yadav 7 years, 1 month ago

as we get charge from a atom and a atom only consists of electron which is - ve and protone + ve that why we dont any other source to produce charge

0Thank You

ANSWER

Why electric field don't intersect

Posted by Nishika Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Devashish Singh 7 years, 1 month ago

If electric field will intersect with each other , then there will be two direction of electric field , which is not possible.

6Thank You

ANSWER

Why do electrostatic field lines not form closed loop

Posted by Vishesh Verma 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Devashish Singh 7 years, 1 month ago

Because electric field emerge from positive side and diverge in negative side of a electric charge . Hence it does not form a closed loop

0Thank You

Inderpreet Singh 7 years, 1 month ago

Because they start +ve charge and end at -ve charge.

0Thank You

ANSWER

what is energy density?

Posted by Pratham Kotwani 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Devashish Singh 7 years, 1 month ago

Energy density is the amount of energy stored in a given system or region of space per unit volume. Colloquially it may also be used for energy per unit mass, though the accurate term for this is specific energy. SI unit: J/m3

0Thank You

ANSWER

A 5ampere current runs through a 12-gauge copper wire (diameter 2.05mm)and through a light bulb. Copper has 8.5 × 10^8 free electrons per cubic meter. How many electrons pass through the light bulb each second

Posted by Satyam Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

An electron is placed in a uniform electric field directed along the positive x axis in which direction will it tend to move

Posted by Vandana Yadav 7 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Inderpreet Singh 7 years, 1 month ago

Along -ve x axis

0Thank You

Harsh Anshu 7 years, 1 month ago

along positive x axis

2Thank You

Nikhil Sharma 7 years, 1 month ago

Along negative x axis

3Thank You

ANSWER

What is the principle of metre bridge?

Posted by Seema Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Harsh Anshu 7 years, 1 month ago

work on the basis of wheatstone bridge

0Thank You

Ayush Jaiswal 7 years, 1 month ago

Wheatstone bridge

0Thank You

Pankaj Gupta 7 years, 1 month ago

Wheatstone bridge

1Thank You

ANSWER

Derive an expression for magnetic field due to a point on the equatorial position.

Posted by Suraj Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Exact definition of second law of motion

Posted by Arpit Saini 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Khushi Mondal 7 years, 1 month ago

2nd NLM- The rate of change of momentum of a body is proportional to the applied force and takes place in the direction in which the force acts. F=ma

0Thank You

ANSWER

A wire of 5 ohm is bent in the form of a closed circle what is the effective resistance b/w the two points at the ends of any diametre of the circle

Posted by Faizan Khan 5 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Harsh Anshu 7 years, 1 month ago

1.25

0Thank You

ANSWER

Is the change on wire when temperature is increased

Posted by Akash Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Harsh Anshu 7 years, 1 month ago

yes..... change in shape due more temp...

0Thank You

Priyanshu Yadav 7 years, 1 month ago

5Thank You

ANSWER

Important numericals from chapter coulomb law

Posted by Resham Romana 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Lucky Mishra 7 years, 1 month ago

Additional Qusetion in ncert

0Thank You

Faizan Khan 7 years, 1 month ago

All ncert numericals

2Thank You

ANSWER

What is electronic configuration

Posted by Rani Pillay Rani 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Expression for Currie law

Posted by Aman Rajak 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Drive equation of i(current) , R(resistance) , G(conductance), p(resistivity) ∆(conductivity) by mobility

Posted by Aman Sikarwar 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

State and drive Krichhoff's law's (current & voltage law)

Posted by Aman Sikarwar 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Khushi Mondal 7 years, 1 month ago

Kirchoff's first law_Junction rule or Current Law According to it the algebraic sum of currents meeting at a junction is zero. Convention:- #Incoming current are positive and outgoing current are negative. #Net incoming current =Net outgoing current i1+i2+(-i3)+(-i4)+(-i5)=0 (I1+i2)-(i3+i4+i5)=0 (i1+i2)=(i3+i4+i5) # K.J.L is based on conservation of charge. Kirchoff's second law_Loop law or Voltage law According to it "the algebraic sum of the changes in potential in complete traversal of a mesh(close loop) is zero".This law is based on that electrostatic force which is conservative in nature and the work done by it in any closed path is zero or we say that K.V.L or Loop law is based on conservation of energy.

0Thank You

ANSWER

If we bend light contineouly and make a circal give contineous light then what happen

Posted by Shivam Singh 7 years, 1 month ago

CBSE > Class 12 > Physics