Electricity and Magnetism Answers

 What is the electric flux through a sphere of radius 1.5 m that carries a charge of

3 nC at its centre?           

Given that E₁ is the modulus of the electric field of a charge q1 situated in an area containing another charge q2 (q2>q1) and E₂ is the modulus of the electric field due to charge q₂ at the point where q₁ is situated.

Which of the following statements is correct?

A. E₁ is greater than E₂

B. E₁ is equal to E₂

C. E₁ is collinear to E₂

D. E₁ is less than E₂

E. q₂E₁ is greater than q₁E₂

An electric induction coil of length of 10cm has 1000 turns of radius 5cm. (μ₀=4π x 10^-7S.I). What is the value of the inductance?

1. Relate the magnetic field around a conductor to the magnitude and direction of the current through it.
2. Explain how the overall magnetic field of an electromagnet is affected by the current, number of windings and the presence of a ferromagnetic core.
3. Explain how the motion of a moving charged particle is affected by an external magnetic field. 

1. Apply the concepts of magnetism, electromagnetism, the motor effect and electromagnetic induction to discussing real-world devices and observed phenomena.
2. Discuss safety issues related to the static magnetic fields and changing magnetic fields used in magnetic resonance imaging (MRI).

1. Apply the quantum nature of EM energy and the Bohr model of the atom to explain photon absorption and emission by an atom
2. Explain how EM is transmitted through matter
3. Explain why the speed of an EM wave changes as it passes through matter
4. Relate the concept of resonance to the absorption of EM energy by matter 

For each form of EM energy on the electromagnetic spectrum, briefly outline how its produced and what interaction and effect it has on the matter in its path.

For the system of capacitors shown in Figure, find :

a. The equivalent capacitance of the system

b. The potential across each capacitor

c. The charge on each capacitor

d. The total energy stored by the group

picrure reference : https://ibb.co/Sn6fwRv

A solid conducting sphere of radius a carries a net positive

charge +2Q. A conducting spherical shell of inner radius b and

outer radius c is concentric with the solid sphere and carries a

net charge -Q. Using Gauss's law, find the electric field in the

regions labeled 1, 2, 3, and 4 in Figure and the charge

distribution on the shell when the entire system is in

electrostatic equilibrium

picture : https://ibb.co/m6h9Wpj