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ANSWER

What is Doppler effect?

Posted by Rajat Shukla 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 7 years, 4 months ago

Doppler Effect is the shift in frequency of light when there is relative motion between the source and observer.
It is used to measure the speed of a receding object.
When the source is moving away from the observer then the wavefronts have to travel a greater distance to reach the observer.
When a star is moving away from the earth the wavelength in the middle of the visible region of the spectrum moves towards the red end of the spectrum.
As a result star looks more reddish when moves away from the earth.
This is known as red shift phenomenon.
When the waves are received from a sourcemoving towards the observer, there is an apparent decrease in wavelength. This is called blue shift.

ANSWER

Ampere's circutal law

Posted by Dharmendra Pandar 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Hy Shona 7 years, 4 months ago

Question khud puchh kr answer bhi khud hi dena chahte ho.sahi hai

Dharmendra Pandar 7 years, 4 months ago

Acc to this law

ANSWER

Define Wheatstone bridge

Posted by Somil Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 7 years, 4 months ago

Wheatstone bridge is used to measure the unknown resistance connected in a circuit. It consists of four resistors of which two resistors are known resistors, one variable resistor and one unknown resistor. It also consists of a galvanometer. It consists of two series-parallel arrangements of resistors.

Sahil Swami 7 years, 4 months ago

It is a type of circuit in which current in galvanometer is zero or is in balanced condition

ANSWER

Ac genenator

Posted by Ganga Shree 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

An ac generator consists of a coil of 50 turns and an area of 2.5 m^2 rotating at a angular speed of 60 rad/s in a uniform magnetic field of B=0.3 T between two fixed pole pieces.The resistance of the circuit including that of a coil is 500 ohm.what is the flux through the coil when a) current is zero b) current is maximum

Posted by Anjali Lal 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is si unit of current~

Posted by Rajit Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Somil Singh 7 years, 4 months ago

Ampere

Amandeep Kumar 7 years, 4 months ago

Ampere

G K 7 years, 4 months ago

Ohm is Si unit of resistance, Kiran kaur...... Ampere is the right answer....

Yashraj Meharwade 7 years, 4 months ago

Ampere (A)

Princesses Kaur 5 years, 11 months ago

Ohm

ANSWER

A water pump driven by petrol raises water at a rate of 0.5m3/min from a depth of 30m if the pump is 70%efficient what power os developed by the engine .g=9.8

Posted by Vishesh Kumar 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

As the electrostatics field inside a conductor is zero ,using gauss law , Charge on the inner surface of the shell -Q Charge on the outer surface of the shelk +Q

Posted by Amrendra Kumar 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Princesses Kaur 7 years, 4 months ago

Concept of displacement current

ANSWER

What is cyclotron ? Define with figure

Posted by Manisha Bhadani 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Neha Yadav 7 years, 4 months ago

Cyclotron is a device used to accelerate charged particle like prton , deuteron, alpha particle to very high energies.

ANSWER

Define cyclotron with diagram

Posted by Somil Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Amrendra Kumar 7 years, 4 months ago

Cyclotron is a device which is accelerate the positively charge particles like as alpha gama

ANSWER

Draw the type of wavefront that corresponds to a beam of monochromatic light coming from a very far of source

Posted by Anurag Rao 7 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Hy Shona 7 years, 4 months ago

Bro

Hy Shona 7 years, 4 months ago

Then am i wrong mohit

Mohit Sepat 7 years, 4 months ago

Plane wave front

Hy Shona 7 years, 4 months ago

It is planar wavefront .i think i am right my friend anurag

ANSWER

A charge q is placed at centre of cube of edge 1, What is the electric flux passing through any three faces of cube ?

Posted by Divyanshu Joshi 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Anjana Sherawat 7 years, 4 months ago

q/3e°

ANSWER

A charge q is enclosed by spherical surface of radius R , if the radius reduce to half what would be the elctric flux through this sphere surface ?

Posted by Divyanshu Joshi 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Anjana Sherawat 7 years, 4 months ago

There will not be any change in electric flux

ANSWER

What is ppt

Posted by Durgesh Bharati 7 years, 4 months ago

CBSE > Class 12 > Physics

6 answers

G K 7 years, 4 months ago

Parts per million is ppm not ppt..... It may be parts per thousand.....

Mohit Sepat 7 years, 4 months ago

Parts per million

Amandeep Kumar 7 years, 4 months ago

Ayush is correct?

Aditya Roy 7 years, 4 months ago

Power point presentation..also

G K 7 years, 4 months ago

Precipitate

Shubham Kushwaha 5 years, 11 months ago

Ppt means persipitate..

ANSWER

The distance between a convex lens and a convex mirror is 10cm when an object is placed at a distance of 12cm from the convex lens then the image formed by the combination coincides with the object. Calculate the focal length of the convex mirror if the focal length of the lens is 10cm.

Posted by Jahanvi Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which chapterwise solved paper is best for class 12 for all subject!!!

Posted by Amir Suhail 7 years, 4 months ago

CBSE > Class 12 > Physics

6 answers

Hy Shona 7 years, 4 months ago

I have arihant and it is very nice

G K 7 years, 4 months ago

Arihant for board class 12

Suriya Sankar 7 years, 4 months ago

Mtg

Sahil Swami 7 years, 4 months ago

Arihant for board and mtg for neet

Sahil Yadav 7 years, 4 months ago

Mtg

4Thank You

Sahil Yadav 7 years, 4 months ago

ANSWER

Explain inductance

Posted by Ronak Bal 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Amrendra Kumar 7 years, 4 months ago

Inductance it is define as the reciprocal of conductance

Kiran Kumawat 7 years, 4 months ago

Flux divided by current

ANSWER

Explain the mechanism and working on a transformer

Posted by Amandeep Kumar 5 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Mohit Sepat 7 years, 4 months ago

Mutual induction is not mechanism its principle

Suriya Sankar 7 years, 4 months ago

The mechanism of transformer is mutual induction

ANSWER

Explain the mechanism and working on an AC generator

Posted by Amandeep Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Amandeep Kumar 7 years, 4 months ago

Aap Jada dealing nahi dijiye

Aditya Roy 7 years, 4 months ago

Chal na chal ka karega pardh ke 55 se zayada laaa smzh 54.5

ANSWER

Why electric field line does not form close loop

Posted by Narayan Sharma 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Mohd Arbaz 7 years, 4 months ago

Because they originate from positive charge and terminate towards negative charge.

Shaista Parveen 7 years, 4 months ago

Becoz they don't have a unique direction

ANSWER

What is Electric flux.

Posted by Arti Vishwakarma 7 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Amandeep Kumar 7 years, 5 months ago

It is the product of electric field and area vector

Akshat Sharma 7 years, 5 months ago

Number of Electric field lines passing perpendicular to the surface.

Rajan Gupta 7 years, 5 months ago

Total magnitude of electric field through unit area . Formula Eds .

ANSWER

A variable frequency 230V alternating voltage is connected across a series combination of L -5.0 H , C -80 nano F , R -40 ohm. Calculate The angular frequency of source which drives the circuit in resonance

Posted by Pooja Tiwari 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Hy Shona 7 years, 4 months ago

W=1/√lc W=1/√5×80×10^-9 W=1/√400×10^-9 W=1/20×10^-3 W=0.05×10^3 Here w is omega i.e angular frequency. I think i am right.and if I am wrong than plzz say