Electricity and Magnetism Answers

Two point charges +4e and +e are fixed at a
distance 'a'. A third charge q is placed on a
straight line joining these two charges so that
q is in equilibrium. Determine the position
of q.

A small object carrying a charge of - 4 x 10^-9 C experiences a force of 15 x 10^-6 N in the
negative x-direction when placed at a point in
an electric field. Calculate the electric field at
this point. What would the magnitude and
direction of the force acting on a proton placed at this point be ?

A transverse wave travelling in the positive
x-direction is represented as
y(x, t) = 5 sin (4.0 t - 0.02 x) cm.
Show that the ratio of maximum
acceleration of the particles of the medium . to
their maximum velocity is 4 : 1.

Sound waves travelling in a liquid are
incident on a liquid-solid interface. The
impedances of the liquid and the solid are
1.43x 106 Nm-1 s and 3.9 x 107 N m-1 s,
respectively. Calculate the percentage of
sound energy reflected back into the liquid.

Two mutually perpendicular oscillations
have angular frequency o)0 and amplitudes
al and a2 such that al > a2. If the initial
phase difference between these is 4),
determine the nature of the resultant
oscillation obtained on their superposition.

Ampers law inconsistent with
1)momentum conservation
2) energy conservation
3)charge conservation

What is an electron

The direction of deflection of an electron beam in a magnetic field can be determined by

a plane electromagnetic wave is incident on the boundary separating the medium of refractive index n1 and n2 at a brewster angle then
1)reflection coefficient is 1
2) transmission quotient is 0 3)transmission coefficient is 1
4)product of reflection coefficient and transmission question is 1

a beam of electrons enters in uniform magnetic field of flux density 1.5 Tesla the energy difference between the electrons whose spin are parallel and antiparallel to the field is
1)1.74×10^-4 eV
2)0.87×10^-4 ev
3)3.48×10^-4 ev
4)2.5×10^-4 ev