A security alarm for an office building door is modeled by the circuit as shown in the attachment. The switch represents the door interlock, and V is the alarm indicator voltage. Find the current through the inductor, iL(t), for t>0. The switch has been closed for a long time at t=0.
What is the relation between the conductance and the capacitance of two parallel conductors immersed in a lossy dielectric medium?
What is the relation between the conductance and the capacitance of two parallel conductors immersed in a lossy dielectric medium that has permittivity 'ε' and conductivity 'σ'?
Three equal charges of 0.5 uC lie at the corners of an equilateral triangle ABC of side a. Find the force on the charge at point A if a = 20 cm . Please see the attachment for the diagram.
Determine the value of current in order that the resultant magnetic field strength at the mid-point on the axis between the coils shall be zero.
Two single turn circular coils share a common horizontal axis and are separated by a horizontal distance of 2.5m. The radius of one of the coils is 50 cm and it carries a current of 5 A. The radius of the other coil is 25 cm and it carries a current I in such a direction that the magnetic field which it produces in the oppositio