If a body contains n1 electrons and n2 protons, the total amount of charge on the body is___________
Answer: (n2 – n1) Both protons and electrons contain a charge equals to 1 but of opposite magnitude. Add the number... View Article
Latest Posts
If an excess charge is placed on an isolated conductor, then, that amount of charge
As the charge inside the conductor is zero, therefore extra charge stays on the outer surface of the conductor.
Trajectory of an electron when it moves perpendicular to the electric field is
The trajectory of an electron when it moves perpendicular to the electric field is parabolic. Charged particles have a tendency... View Article
An electron initially at rest is accelerated through a potential difference of 1 V. The energy gained by the electron is:
Energy = qV = (1.6 x 10-19C) x(1 V) = 1.6 x 10-19J
A circular loop of radius R carrying current I lies in x-y plane with its centre at origin. The total magnetic flux through x-y plane is
Circular loop behaves as a magnetic dipole whose one surface will be N-pole and another will be S-pole. Therefore magnetic lines a... View Article
What is the angle between the electric dipole moment and the electric field on the equatorial line of the dipole?
On equatorial line, the direction of electric field is reversed to that of angle of axial line. Therefore, the angle... View Article
Electric field of a point charge extends up to r where 1/r is
The electric field extends till infinity so 1/r tends to zero.
Four like charges each of +q are placed at the corners of a square of side a. The electric field intensity at the centre of square will be:
Consider unit positive charge at the centre of square. The electric field intensities at opposite sides of square are equal in... View Article
An electric dipole consists of a positive and negative charge of 4 μC. Each placed at a distance of 5 mm. The dipole moment for the system is
Given: q = 4 μC = 4 × 10-6 d = 5 mm = 5 ×10-3 The dipole moment = charge x... View Article
Ratio of the permittivity of medium to the permittivity of free space is known as
Ratio of the permittivity of medium to the permittivity of free space is known as Dielectric constant.
SI unit electric field and electric force are
electric field is force per unit charge so its SI unit is N/C and for electric force SI unit is... View Article
State Conservation of Charge
The law of conservation of charge states that an electric charge can neither be created nor be destroyed. In an... View Article
When conductors are placed in an electric field, their electrons are moved
Electrons in a conductor move in the opposite direction when placed in an electric field. Inside the conductor, now there are... View Article
Quarks are entities that have____________
Quarks are entities that have fractional electric charges. Quarks are fundamental matter particles that are constituents of neutrons and protons. Definition... View Article
A silk cloth rubbed with a glass rod acquire a charge (-1.6 – 10 -19) C. Then the charge on the glass rod is
An equal and opposite charge is transferred from one body to another, when one body is rubbed with another.
A coulomb is same as:
Current = charge/time 1 amp = 1 coulomb/ 1 sec So, one coulomb is ampere times second.
The value of charge on a body which carries 30 excess electrons is
Here, n = 30 q =? e = – 1.6 × 10 -19 C So, q = n × e = 30... View Article
When a hard rubber rod is given a negative charge by rubbing it with wool:
a)Positive charges are transferred from rod to wool. b)Negative charges are transferred from rod to wool. c)Positive charges are transferred... View Article
According to the principle of conservation of charge___________
According to the principle of conservation of charge the total electric charge in an isolated system never changes. The charges... View Article
Liquid pressure is measured by
To measure liquid pressure, a manometer is used. Liquid pressure is defined as the increase in the pressure when there... View Article
