There is a frill of $20$ bulbs connected in series in a room. One bulb gets fused. The remaining $19$ are again joined in series and connected to the same supply. Will the light increase or decrease in the room ?
A student carries out an experiment and plots the $V-I$ graph of three samples of nichrome wire with resistances $R_1, R_2$ and $R_3$ respectively (Figure.). Which of the following is true?
What is the maximum resistance which can be made using five resistors each of $1/5\,\Omega $ ?
Mention two special features of the material to be used as element of an electric iron.
What can be the difference between the specific resistance for a thin and thick wire made of the same material ?