An iron cored coil is connected in series with an electric bulb withan AC source as shown in figure. When iron piece is taken out ofthe coil, the brightness of the bulb will(i) decrease(ii) increase(iii) remain unaffected(iv) fluctuate

A coil of wire is carrying an electric current. How will the magnetic field of the coil be affected if an iron rod is placed in its center ?A The field will be cancelled out. B The strength of the field will increase. C The strength of the field will decrease. D The direction of the field will reverse.

A capacitor, an inductor and an electric bulb are connected in series to an AC supply of variable frequency. As the frequency of supply is increased gradually, then the electric bulb is found toIncrease in brightnessDecrease in brightnessIncrease in brightness, reach a maximum and then decrease in brightnessOf same brightness

A solenoid having an iron core has its terminals connected across an ideal D.C. source. If the iron core is removed the current flowing through solenoid

Iron loss an electrical transformer occurs in

Two identical bulbs are connected to an AC source by using an inductor and a capacitor in series with the bulbs as shown in the figure. The brightness of the bulbs B1𝐵1 and B2𝐵2 will be