Three incandescent bulbs of $100 \mathrm{W}$ each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source. Will the bulb in the two circuits glow with the same brightness? Justify your answer.

Three incandescent bulbs of $100 \mathrm{W}$ each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source.

Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.

Find out in the electric circuit shown in figure, the effective resistance of two $8 \mathrm{\Omega }$ resistors in the combination.

Find out in the electric circuit shown in figure the current flowing through $4 \mathrm{\Omega }$ resistor.