(i) What is an angle between phasor `V_(R )` and I ?
(ii) Voltage phasor `V_(C )` is `( pi)/(2)` `"……………."` of the current phasor I. ( Fill up the blank )

What is phase difference between V and I in a circuit containing only a resistor ?

Sea water at frequency v=4xx10^(8) Hz has permittivity in ~~ 80 in_(0) , permeability mu = mu_(0) and resistivity rho = 0.25 Omega , Imagine a parallel plate capacitor immersed in sea water and driven by an alternating voltage source V(t)=V_(0)sin 2pi vt . What fraction of the conduction current density is the displacement current current density ?

In a p-n junction diode, the current I can be expressed as I= I_(0) "exp" ((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6 xx 10^(–5) eV//K) and T is the absolute temperature. If for a given diode I_(0) = 5 xx 10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V? (c) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V?

In a p-n junction diode, the current I can be expressed as I=I_(0)"exp"((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6xx10^(-5)eV//K) and T is the absolute temperature. If for a given diode I_(0)=5xx10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V ? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V ? (c ) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V ?

An electrical device draws 2 kW power from AC mains (voltage 223V (rms) V_(rms) = sqrt(50000) V ). The current differs (lags) in phase by (tan phi=-3/4) As compared to voltage. Find (i) R, (ii) X_C - X_L , and (iii) I_M . Another device has twice the values for R, X_C and X_L . How are the answers affected ?

Power P is to be delivered to a device via transmission cables having resistance R_(C) lf V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.

An unchanged conductor of inner radius R_(1) and outer radius R_(2) contains a point charge q placed at point P (not at the centre) as shown in figure? Find out the following: (i) V_(C) (ii) V_(A) (iii) V_(B) (iv) E_(A) (v) E_(B) (vi) force on charge Q if it is placed at B

Six resistances each of v ale r= 6Omega are connected between points A,B and C as shown in the figure if R_(1),R_(2) and R_(3) are the net resistances between A and B, between B and C and between A and C respectively, the R_(1):R_(2):R_(3) will be equal to

In the circuit shown in figure, when the input voltage of the base resistance is 10V, V_(BE) is zero and V_(CE) is also zero. Find the values of I_(B), I_(C ) and beta .

A uniform conducting wire of length 12a and resistance R is wound up as a current carrying coil in the shape of : (i) an equilateral triangle of side a, (ii) a square of sides a and, (iii) a regular hexagon of sides a. The coil is connected to a voltage source V_(0) . Find the magnetic moment of the coils in each case.