Advertisements
Advertisements
प्रश्न
State the basic principle behind the working of an ac generator.
उत्तर
It is based on Faraday's law of electromagnetic induction. When a coil in a uniform magnetic field is rotated along an axis perpendicular to the field, the magnetic flux associated with the coil changes, and an induced emf is created across its ends.
संबंधित प्रश्न
Obtain the expression for the emf induced in the rotating coil of N turns each of cross-sectional area A, in the presence of a magnetic field `vecB` .
State the principle of an ac generator and explain its working with the help of a labelled diagram. Obtain the expression for the emf induced in a coil. having N turns each of cross-sectional area A, rotating with a constant angular speed 'ω' in a magnetic field `vecB` directed perpendicular to the axis of rotation.
Describe briefly, with the help of a labelled diagram, the basic elements of an A.C. generator.
The instantaneous values of alternating current and voltage in a circuit are
i = `1/sqrt2` sin 100π A and
v = `1/sqrt2 sin (100 pi"t" + pi/3)"V"`.
The average power in watts consumed in the circuit is
A flexible metallic loop abcd in the shape of a square is kept in a magnetic field with its plane perpendicular to the field. The magnetic field is directed into the paper normally. Find the direction of the induced current when the square loop is crushed into an irregular shape as shown in the figure.
In an A.C. circuit, the peak value of voltage is 320 volt. Its effective voltage is ______
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?
In an A.C circuit, the current
A common transistor radio set requires 12 V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a rectifier circuit, which are operated at 220 V (A.C.) on standard domestic A.C. supply. The number of turns of secondary coil are 24, then the number of turns of primary are ______.
