Electricity and Magnetism Answers

Explain the behavior of a diffracted wave on

a) a slit

b) the aperture

Two charged particles are 8.45 cm apart. They are moved and the force on each of them is found to have tripled. How far are they now?

If a proton at a particular distance from a charged particle is repelled with a given force, by how much will the force decrease when the proton is 3 times farther away from the particle?

Apply ing the gauss,'law, prove that the sta le equilibrium(to hold a charged body) is not possible by a static system of charge alone.

A farmed painting weighs 30kg. The two wires supporting it makes an angle of 120° with each other. What are the tensions in the wire?

“Write the name of at least five modern devices, whose working principle is based on Maxwell Equations

Two equal positive point charges q1=q2=2µC interact with a third point charge q3=4µC. Find

the magnitude and direction of the total (net) force on q3. (q1 is 0.3m above the origin; q2 is

0.3m below the origin; q3 is 0.4m right from the origin).

Calculate the buoyant force on a cube of metal with an edge of 1.3 cm that is placed in salt water. The density of the metal is 7.86 x 103 kg/m², and the density of the salt water is 1.025 x 103 kg/

A particle moves in a slowly varying magnetic field 𝐵⃗ = 𝐵𝑧(𝑥)kcap and a uniform magnetic field and in small electricfield 𝐸⃗ = 𝐸𝑦jcap. Calculate the drifts. Show that change in perpendicular kinetic energy can be accounted for by the drift along the electric field. Calculate the rate of change of (1/2)m(V perpendicular)^2

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If two charges of magnitudes 2c and 5c are located at free space between 10 metres with the constant k=20 metre/farad, then the force between the charges will be