Electricity and Magnetism Answers

Hi, so I’m stuck on a question where I have to prove that the radius of the curvature of a particle is equal to (1/BQ) * (2*Ek*m)^0.5, using the centripetal force equation, kinetic energy and F=BQv to do so. Can someone help me please?

if the peak current of a.c source is 14A then the rms current to nearest ampere is ..

For a parabolic dish antenna, show that the
–3db beam width with D = 6m and Wavelength= 3 cm is 0.35°.

Explain the sampling scheme used in time division multiplexing system for transmission of 6 channels.

Define radiation pattern and gain of an antenna. Write one example of an antenna.

Question 1
Vanadium is a transition element. it has more than one oxidation state. The element and its compounds are often used as catalysts.

(a) Complete the electron distribution of vanadium by inserting one number.

2+8+ .......... +2

(b) Vanadium (V) oxide is used to catalyse the exothermic reaction between sulfur dioxide and oxygen in the Contact Process.

2SO2 + O2 = 2SO3

The rate of this reaction can be increased either by using a catalyst or by increasing the temperature. Explain why a catalyst is used and not a higher temperature.

(c) The oxidation states of vanadium in its compounds are V (+5), V (+4), V (+3) and V (+2). The vanadium (lll) ion can behave as a reductant or an oxidant.

(i) indicate on the following equation which reactant is the oxidant.

2V^3+ + Zn = 2V^2+ + Zn^2+

(ii) which change in the following equation is oxidation?
Explain your choice.

V^3+ + Fe3+ = V^4+ + Fe^2+

There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy.” -Hamlet

A long solenoid of length L and radius R has a total of N turns and carries a current I. The solenoid is held firmly in place and cannot rotate.
a. Use Ampere’s law to determine the magnetic field inside the solenoid (far from itsends).

An alpha particle (charge +2e) and an electron move in opposite directions from the same point, each with the speed of 2.50 X 105 m/s (Fig). Find the magnitude and direction of the total magnetic field these charges produce at point p. which is 1.75 nm from each of them.

A glass rod that has been charged to +13.0 NC touches a metal sphere. Afterward, the rod's charge is +7.0 NC.How many charged particles were transferred?

.

Derive an expression for the electric field at a point :
(i) along the axis of a dipole, and
(ii) on the perpendicular bisector of the
dipole axis