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

No products in the cart.

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

Ask Question

What is cuarent

Posted by Hitesh Rajput 8 years, 1 month ago

1 answers

Kalindi Yadav 8 years, 1 month ago

Current is flow of electrical charge carriers, usually electrons or electron deficient atoms.It is denoted I.Its SI unit is Ampere and is denoted by A.

0Thank You

ANSWER

What is definection of cuarent

Posted by Hitesh Rajput 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Kanak Tiwari 8 years, 1 month ago

Garima how your physics is too good?

0Thank You

Kalindi Yadav 8 years, 1 month ago

Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. The common symbol for current is the uppercase letter I. The standard unit is the ampere, symbolized by A.

2Thank You

ANSWER

Sir agar Koi student medical lagarkar 12 ka exam chhod dega toh next year Usi registration no. Par exam dene k liya applicable hoga? Pls sir tell me .

Posted by Amar Jeet Maurya 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is analytical method to solve for lcr circuit in 2018 syllabus?????????

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Hydrogen atom absorb a photon whose energy exceeds its binding energy. Why ?

Posted by Shagun Waraich 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shagun Waraich 8 years, 1 month ago

JAldi btao

0Thank You

ANSWER

the image of small electric bulb fixed on the wall of a room is to be obtained on the opposite wall3m away by means by large convex lens. what is the maximum focal length of the lens require for the purpose?

Posted by Amarvir Amarvir 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which all the derivationsame are important

Posted by Preeti Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Gauss's law and its application

Posted by Ilana Lana 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A mirror is turned through 15degree . with what angle will the reflected ray turn?

Posted by Amaljith J D 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Kalindi Yadav 8 years, 1 month ago

When a mirror rotates through an angle θ a ray of light reflected from it will rotate through an angle of 2θ. So if a mirror is turned through 15°, the reflected ray will turn through 30°.

0Thank You

Vinayak Luha 8 years, 1 month ago

30 perhaps ?

2Thank You

ANSWER

What are the topics that are ommitted by cbse for physics board exam 2018

Posted by Namami Shukla 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is inertia

Posted by Rishabh Pandey 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kalindi Yadav 8 years, 1 month ago

The property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

0Thank You

ANSWER

Reddish appearance at sun rise & sun set

Posted by Suraj Mudgal 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shatabdi Biswas 8 years, 1 month ago

It's due to T. I. R

1Thank You

Nikhil Khandal 8 years, 1 month ago

It is due to scattering of light As acc.to Rayleigh law wavelength is inversely proportional to i^4

2Thank You

ANSWER

Additioal excerise is imp in. Physicsncert

Posted by Kiti Thakur 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Priya Prakash S 8 years, 1 month ago

1Thank You

ANSWER

Which all derivations r imp?????

Posted by Divyesh Tharakan 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Any girl who is looking for smart boy friend....????

Posted by Sharma Saabh 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which type of quantity of charge Scalar or vector Or neither scalar nor vector

Posted by Alia Khan 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Kalindi Yadav 8 years, 1 month ago

Electric charge is a scalar quantity.

0Thank You

Yuthika Yadav 8 years, 1 month ago

Scalar

0Thank You

ANSWER

What is mirror formula? Write its expression for cancave and convex

Posted by Prabal Pratap 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Rahul Mahala 8 years, 1 month ago

1/f=1/u+1/v

2Thank You

ANSWER

What is form factor

Posted by Aisha Grewal 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shivanshu Yadav 8 years, 1 month ago

Hey tum zinda h ??? yeh kis unit ka h

2Thank You

ANSWER

Is transistor oscillator in 2018 syllabus????

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Rahul Mahala 8 years, 1 month ago

1Thank You

Simran Singh 8 years, 1 month ago

1Thank You

ANSWER

Is "feedback amplifier and transistor oscillator" topic important????

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Rahul Mahala 8 years, 1 month ago

Not in syllabus

1Thank You

ANSWER

Led working diagram?????????

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

is davisson germer experiment in syllabus of 2018???

Posted by Aviral Tandon 8 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Rahul Mahala 8 years, 1 month ago

Yes

1Thank You

Ishu Chouhan 8 years, 1 month ago

Yes

0Thank You

Simran Singh 8 years, 1 month ago

Experimental details omitted but conclusion is important

0Thank You

Priya Prakash S 8 years, 1 month ago

1Thank You

Simran Singh 8 years, 1 month ago

Yes

1Thank You

ANSWER

Working of led diagram???? Any source???

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Priya Prakash S 8 years, 1 month ago

Diagram is not given in book

0Thank You

Aviral Tandon 8 years, 1 month ago

book me dia hai padho

0Thank You

Aviral Tandon 8 years, 1 month ago

pata nhi

2Thank You

Simran Singh 8 years, 1 month ago

Yes ..it is also in cbse ...working and construction of led

0Thank You

ANSWER

Davisson germer expt removed from syllabus??

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Shatabdi Biswas 8 years, 1 month ago

Result Hai book Mai

0Thank You

Aviral Tandon 8 years, 1 month ago

yahi to mjhe bhi ni pata bhai

0Thank You

Simran Singh 8 years, 1 month ago

It is in ncert

0Thank You

Simran Singh 8 years, 1 month ago

0Thank You

ANSWER

Is Davisson germer expt important??

Posted by Priya Prakash S 8 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Deep Roy 8 years, 1 month ago

Very much

1Thank You

Ishu Chouhan 8 years, 1 month ago

Very important

0Thank You

Simran Singh 8 years, 1 month ago

Yes

0Thank You

ANSWER

Derive an expression for power factor.

Posted by Shivi Rajput 8 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Kalindi Yadav 8 years, 1 month ago

Ev Iv is apparent power or virtual power.

1Thank You

Kalindi Yadav 8 years, 1 month ago

Power Factor of an AC circuit is defined as the ratio of true power to apparent power of the circuit. Since,P=Ev Iv cos ϕ Here,P is called true power,Ev Is is called apparent power or virtual power. Thus,Power Factor =True Power/Apparent Power=P/Ev Iv= cos ϕ=R/Z=Resistance/Impedance=R/√R²+(Xl-Xc)²(from Impedance triangle). Power Factor is always positive,but less than one or most equal to one.

1Thank You

ANSWER

Hard

Posted by Saqib Gori 8 years, 1 month ago

CBSE > Class 12 > Physics