(i) No field line originates or terminates in the space surrounding a charge. Every field line is a continuous and smooth curve originating... View Article
The field lines due to a single positive charge have shown. The field lines are directed radially outwards and end only at infinity. The... View Article
Important characteristics of electric field lines: (i) A tangent to a field line gives the direction of is a P2. (ii) The direction in which a... View Article
An electric field line, a convenient (though imaginary) concept introduced by Michael Faraday is commonly used to represent an electric field. It... View Article
Paper moves towards the comb, i.e., in the direction of increasing It is important to remember that the field near the comb is stronger than... View Article
Answer: Zero A pair of electric charges with an equal magnitude but opposite charges separated by a distance d is known as an electric dipole.... View Article
A line perpendicular to the axial line and passing through the midpoint of electric dipole is called its equatorial line. Consider a point P on... View Article
A line passing through the positive and negative charges of the dipole is called the axial line of the electric dipole. Consider a point P on the... View Article
An electric dipole is characterised by a vector quantity called the electric dipole moment which is defined by where q - The magnitude of... View Article
An electric dipole consists of two equal and opposite charges, -q and +q, separated by a very small distance 2a. Although in an electric dipole... View Article
Solved question 1: what is the drift velocity of electrons in a copper wire of cross-sectional area 1.5 mm2 when a 3A is flowing through it?( n =... View Article
We know that I = nAqVd from which we can say that Vd = I/nAq. In the given question, the magnitude of current, values of n and q are same... View Article
This is possible because an electric field is set up in the circuit as soon as it is closed, almost with speed of light. This causes a local... View Article
Answer: Current density J is a vector quantity that is defined as the current flowing per unit area measured in a direction normal to the... View Article
Mobility m is the magnitude of drift velocity per unit electric field. m = |Vd |/E = qt/ m The S.I unit of mobility is m2/Vs. Mobility is a... View Article
Electric current flowing through a conductor I = nAqVd where A = cross-sectional area of the conductor, n= number of conduction electrons per... View Article
Generally, charged particles like electrons in a conductor move with velocities in random directions such that the average velocity of the... View Article
The origin of magnetic ordering is the quantum mechanical exchange effect. The physics behinds the exchange effect is the coulombic interactions... View Article
Curie – Weiss theory which explains the qualitative explanation of the ferromagnetism. We also call it as molecular field theory. In this... View Article
