Wattless Current and Eddy Current

(A) : In Ampere Maxwell law, displacement current has same physical effect as conduction current. (R) : The units and dimensions of displacement current and conduction current are same.

The current in a certain circuit varies with time as shown in figure. Find the average current and the rms current in terms of I_0 .

(a) For given transistor circuit, the base current is 10muA and the collector current is 5.2 mA. Can this transistor circuit be used as an amplifier. Your answer must be supported with proper explanation. (b). For a common emitter amplifier, current gain is 69. if the emitter current is 7 mA then calculate the base current and collector current.

When a junction diode is reverse biased, then current called drift current is due to

Derive the expression for the average power disspated in a series LCR circuit for an ac source of a voltage, v=v_(m)sinomegat , carrying a current, i=i_(m)sin(omegat+phi) . Hence, define the term ''Wattless current''. State under what condition it can be realized in a circuit.

A coil has inductance of (11)/(5pi)H and is joined in series with a resistance of 220Omega . When an alternating emf of 220V at 50Hz is applied to it, then the wattless component of the current in the circuit is

Let I_E,I_C and I_B represent the emitter current,the collector current and the base current respectively in a transistor.then

Assertion : In a purely inductive or capacitive circuit, the current is referred to as wattless currents. Reason : No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

Assertion : A metallic surface is moved in and out in magnetic field then emf is induced in it. Reason : Eddy current will be produced in a metallic surface moving in and out of magnetic field.

Consider a current carrying wire (current I) in the shape of a circle. Note that as the current progresses along the wire, the direction of vecJ (current density) changes in an exact manner, while the current I remains unaffected. The agent that is essentially responsible for is