To study the factor on which the self inductance of a coil depends by observing the effect of this coil, when put in series with a resistor (bulb) in a circuit fed up by an
a.C. Source of adjustable frequency.
Answers
Answer:
See below explanation
Explanation:
Self-Inductance is the property of a coil which oppose the change in current through it! The Self Inductance of a coil (long solenoid) is
L = (µ0µrAN^2 )/I
To study this effect, we need following materials;
A coil of large turns, a.c. source of adjustable frequency, an electrical bulb, (6V) a.c. ammeter of suitable range rheostat, a soft iron rod, one way key, connecting wires etc.
Observations taken;
The current in the circuit decrease on inserting the iron rod in the core of coil at constant frequency of applied voltage and brightness of bulb decrease and vice-versa.
The current in the circuit increase on decreasing the frequency of applied voltage and vice-versa. Therefore, the brightness of bulb increase