Advertisements
Advertisements
प्रश्न
The coil of an ac generator consists of 100 turns of wire, each of area 0.5 m2. The resistance of the wire is 100 Ω. The coil is rotating in a magnetic field of 0.8 T perpendicular to its axis of rotation, at a constant angular speed of 60 radians per second. Calculate the maximum emf generated and power dissipated in the coil.
उत्तर
Given: N = 100, A = 0.5 m2, ω = 60 rad/s
B = 0.8T
R = 100 Ω
As induced emf is given by,
= NBA ω sin ωt
Max emf e0 = NBAω = `100 xx 0.8 xx 0.5 xx 60`
= 2400 V
Induced current (max)I0 = `e_0/R`
= `2400/100 = 24` A
Power = `e_0I_0`
= `2400 xx 24 = 5.760 xx 10^4` watt
APPEARS IN
संबंधित प्रश्न
State the principle on which the AC generator works. Draw a labelled diagram and explain its working.
State the working of a.c. generator with the help of a labeled diagram.
The coil of an a.c. generator having N turns, each of area A, is rotated with a constant angular velocity ω. Deduce the expression for the alternating e.m.f. generated in the coil.
What is the source of energy generation in this device?
In an electrical circuit, R, L, C, and AC voltage sources are all connected in series. When L is removed from the circuit, the phase difference between the voltage and current in the circuit is `π/3`. Instead, if C is removed from the circuit, the phase difference is again `π/3`. The power factor of the circuit is
Define average value of an alternating current.
The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say A). Which of the following statements correctly depicts the phenomenon taking place?
A resistor, capacitor, and inductor are connected in series across an AC generator. Which of the following statements is false?
The average value of alternating current over a full cycle is always ______. [I0 = Peak value of current]
Briefly describe the working of ac generator.
Obtain the expression for the instantaneous value of emf induced.
An AC generator spinning at a rate of 750 rev/min produces a maximum emf of 45 V. At what angular speed does this generator produce a maximum emf of 120 V?
