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

The force of attraction or repulsion between two point charge is directly propotional to the product of magnitude of charges and inversely propotional to the square of distance between them.

1Thank You

Alok Agrahari 3 years, 2 months ago

The force of attraction between the two charges is directly proportional to the product of the two charges and inversely proportional to the square of the distance between the two charges

2Thank You

Kuldeep Kuldeep 3 years, 2 months ago

F = k q1q2 /r^2

3Thank You

Kaif Khan 3 years, 2 months ago

The force of attraction or repulsion between two point charges is directly proportional to the product of two charges and is inversely proportional to the square distance between them

3Thank You

ANSWER

Experiments of meter bridge

Posted by Akash Deep 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Deepika Yadav 3 years, 2 months ago

It is a device based on wheat stone bridge it consist of 1 m long straight and uniform wire AC The wire is made up of manganin constantan because they have low temperature coefficient and large resistivity. Wire are soldered to two thick 1- shaped copper strips with binding terminal on a wooden board between these 1-shape strips there is a third copper strip. Thus between the strips there are two fixed gap Ab and CD in meter scale is also tittled on the wooden board parallel to the length of wire Across 1 gap a resistance box R and another gap the unknown resistance S are connected a jockey B can be slided on the bridge wire one terminal of the sensitive galvanometer is connected to jockey B and the other to the terminal D the positive terminal of the battery E is connected to terminal A and negative pole of the battery to come battery to terminal c through a one way key k. This circuit is now same as that wheat stone bridge.

2Thank You

ANSWER

Relation between electric field potential gradient

Posted by Mannat Gangwar 3 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Vivek Rai 3 years, 2 months ago

E=dv/dr

1Thank You

Deepika Sihag 3 years, 2 months ago

Potential gradient is equal to the 1/l times of electric field,i.e, V=E/l (where l is the distance between the charges)

2Thank You

ANSWER

Is a convex mirror cannot form real image

Posted by Naseeb Sindhu 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Alok Agrahari 3 years, 2 months ago

Yes

0Thank You

ANSWER

Critical angle for water air interface is 53 degree What is refractive index of water

Posted by Naseeb Sindhu 2 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

how will you convert a voltmeter of 10 volt having resistance of 100ohm into a voltmeter that can measure 100 volts ?

Posted by Vinay Rawat 3 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The dielectric constant of water is 80 . What is its permittivity?

Posted by Kaif Khan 3 years, 3 months ago

CBSE > Class 12 > Physics

5 answers

Sheebu Tiwari 3 years, 2 months ago

8.9000

0Thank You

Bimala Madkami 3 years, 3 months ago

What is possibility

0Thank You

Abhishek Kumar 3 years, 3 months ago

Permittivity :- = [8.854*10^(-12)] * 80 = 7.083*10^(-10)

3Thank You

Shivansh Chauhan 3 years, 3 months ago

708.32 × 10^(-12)

0Thank You

Tinesh Waykole 3 years, 3 months ago

Permittivity = [8.854*10^(-12)] * 80= 7.083*10^(-10)

3Thank You

ANSWER

Define reasoant frequency

Posted by Rohan Kumar 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 2 years, 11 months ago

Resonant frequency is the natural frequency where a medium vibrates at the highest amplitude. Resonant frequency is usually denoted as f0. Resonance is witnessed in objects in equilibrium with acting forces and could keep vibrating for a long time under perfect conditions.

0Thank You

ANSWER

What will be deflection of compass when it place between geographic north pole and magnetic north pole?

Posted by Himanshu Kumar 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Akash Gupta 3 years, 3 months ago

SI unit of charge

2Thank You

ANSWER

Figure shows a cross-section of a large metal sheet carrying an electric current along its surface. The current per unit width (or length) is 2. Find the magnetic field at a point P at a distance x from the metal sheet.

Posted by Sachin Maurya 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Kapil Saini 3 years, 3 months ago

Where is figure

0Thank You

ANSWER

What s physics

Posted by Yash Bhardwaj 3 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Lucky Verma 3 years, 3 months ago

Physics is a study of natural phenomenon.

0Thank You

Dhanajit Mutum 3 years, 3 months ago

Branch of science deals with the study of nature and natural phenomenon

0Thank You

ANSWER

When should we subtract or add 2 values of electric field intensities at a point to find the total elctric field at that point? same for magnetic field too. when should I add and when should I subtract two values of the magnetic field at a point to find the total magnetic field at that point.

Posted by Y Y 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Faisal Sabri 3 years, 3 months ago

1Thank You

ANSWER

What is the SI unit of relative permittivity

Posted by Anu Anu 3 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Kaif Khan 3 years, 3 months ago

Unitless

0Thank You

Sanjana Banjara 3 years, 3 months ago

C2/nm2

0Thank You

Rupam Baruah 3 years, 3 months ago

Unitless

0Thank You

ANSWER

What is magnetic field?

Posted by Ravindra Joshi 3 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Felix Dungdung 3 years, 3 months ago

It is a imaginary field, when any metals come this field, it shows attractive property.

0Thank You

Tanishka Kashyap 3 years, 3 months ago

The space around the magnet with which its influence

4Thank You

ANSWER

Difine Lorentz force

Posted by Vicky Yadav 3 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Deepika Yadav 3 years, 2 months ago

The total force experienced by a charge particle moving in a reason where both electric field and magnetic field are present, is called lorentz force

0Thank You

Lucky Verma 3 years, 3 months ago

The force observed by lorentz in elctric and magnetic field on a moving charge is given by F=q(E+V*B)

0Thank You

Haraks Duggal 3 years, 3 months ago

The combination of Magnetic Force and Electric force F= qE + qVvector x Bvector F=q(E+VVector x B vector)

0Thank You

Vicky Yadav 3 years, 3 months ago

Difine Lorentz force

2Thank You

ANSWER

Difference between potential and potential difference

Posted by Tanuj Vishwakarma 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rupam Baruah 3 years, 3 months ago

Potential defined in one point from infinity ... Otherwise potential difference is between two finite points......

0Thank You

ANSWER

Difference between potential and potential difference

Posted by Tanuj Vishwakarma 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 3 years ago

Electric potential is the work done per unit charge to Potential difference is the bring the charge from infinity to a point in an electric difference between the field. potentials between two points in the electric field.
Electric potential is defined at a point.
Potential difference is defined between two points in electric field.
The unit of electric potential is volts.
The unit of potential difference is volts.
Electric potential is a scalar quantity.
Potential difference is also a scalar quantity.
Electric Potential is taken as zero at infinity.
There is no as such concept for potential difference.

0Thank You

ANSWER

Short notes of electrostatic chapter

Posted by Sandeep Kumar 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Tutturaj Mahakud 3 years, 3 months ago

Yes

0Thank You

ANSWER

How to learn all derivations

Posted by Mehakpreet Kaur 3 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Mehakpreet Kaur 3 years, 3 months ago

Thanks alot 😊

0Thank You

Hruday Reddy 3 years, 3 months ago

Write and practice

8Thank You

Shivang Mishra 3 years, 3 months ago

Chap 10 wave optics summary

12Thank You

ANSWER

Explain the formation of mirage

Posted by Harika Godavarthi 3 years ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 3 years ago

Mirage is caused due to total Internal Reflection of light by the various layers of air. It is an optical illusion which is responsible for the appearance of the water layer at short distances in a desert or on the road. Mirage is an example of total internal reflection which occurs due to atmospheric refraction.

0Thank You

ANSWER

State and explain Biot Sawart's law

Posted by Sachin V 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Anubhav Singh 3 years, 3 months ago

Biot Savart law states that the magnetic field due to a tiny current element at any point is proportional to the length of the current element, the current, the sine of the angle between the current direction and the line joining the current element and the point, and inversely proportional to the square of the distance of that point. The direction of the magnetic field is in the direction of dl cross r. You can also use the right hand clasp rule to figure out the direction

0Thank You

ANSWER

Proof Gaussian law

Posted by Swati Pandey 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rupam Baruah 3 years, 3 months ago

Gausian law can be proved by . Taking a close sphearical surface

0Thank You

ANSWER

Aahar ke teen poshak tatavo ke baare m sankshep kijiye

Posted by Simran Kaur 3 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Lucky Verma 3 years, 3 months ago

Carbohydrates , protein, abd fats

0Thank You

Lavish Tyagi 3 years, 3 months ago

Protein carbohydrates and fats

2Thank You

ANSWER

A solenoid 80cm long has 5 layer of winding of 400 turns each the diameter of solenoid is 1.8 cm if the current carries is 8A find the magnitude of current inside the solenoid and at the corner all

Posted by Ujala Pandey 3 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain principle of super position ?

Posted by Abhi Sh 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Quraish Khan 3 years, 3 months ago

The superposition principle states that when two or more waves overlap in space, the resultant disturbance is equal to the algebraic sum of the individual disturbances.

2Thank You

ANSWER

What is the use of concave pole pieces in galvanometer

Posted by Sonalika Mohanta 3 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Anjan Karthi 3 years, 3 months ago

The concave pole pieces ensured that the current through the coil and the magnetic field always remained perpendicular to each other.

0Thank You

ANSWER

What is the function of shunt resistor

Posted by Aditya Singh 3 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Y S 3 years, 3 months ago

We use shunt resister to free up galvanometer from flowing more current as galvanometer measure only small unit of current so in case of this we use a resister i. e parrallel to the galvanometer resister in the circuit to detect the current in galvanometer

1Thank You

Anjan Karthi 3 years, 3 months ago

When a moving coil galvanometer is connected in parallels with a shunt resistor, the galvanometer can be used to find the amount of current flowing through the circuit and thereby, can behave as an ammeter.

1Thank You

ANSWER

A resistor R and indicator L are connected in series which voltage V=Vo sin wt. The voltage is found leads the current in phase π\4.if ihe inductor replace by capacitor C the voltage leads behind in phase π\4. Find average power dissipated Instantaneous current in circuit

Posted by Arjunpreet Singh Maan 3 years, 3 months ago

CBSE > Class 12 > Physics