1)A bulb is connected in series with an inductor and a 6 volt D.C supply. A soft iron core is inserted into the coil quickly. It is said that there is a momentary increase in the intensity of the bulb because at that particular instant the induced e.m.f is greater than the e.m.f of the source. Is it true?
2)Now, the D.C source is replaced by an A.C source having an r.m.s voltage of 6 volt and 50 Hz frequency. When compared to the intensity of the bulb in first question when steady state is reached, how will be the intensity of the bulb?
The book answer says that the intensity of the bulb is greater when steady state is reached(A.C voltage circuit) than in the D.C circuit. Is it true? If so, is it because the r.m.s value of voltage being 6 volts, the peak value will be greater than that and so the intensity of bulb increases?
2)Now, the D.C source is replaced by an A.C source having an r.m.s voltage of 6 volt and 50 Hz frequency. When compared to the intensity of the bulb in first question when steady state is reached, how will be the intensity of the bulb?
The book answer says that the intensity of the bulb is greater when steady state is reached(A.C voltage circuit) than in the D.C circuit. Is it true? If so, is it because the r.m.s value of voltage being 6 volts, the peak value will be greater than that and so the intensity of bulb increases?