Vikalp's father had constructed a new room in their house. An electrician was called in to do the electric wiring. The electrician was asked to do wiring for two fans, two bulbs, a light socket and a power socket. Vikalp studies in tenth standard. Just when the electrician had completed the wiring, Vikalp returned home from school. Vikalp wanted to check the wiring to by using all the switches and sockets. Vikalp found that the two fans and two sockets worked properly, each having a separate switch but there was a problem in the working of bulbs. Both the bulbs could be switched on and switched on and switched off with the same switch. Vikalp explained the mistake in wiring to electrician and then two separate switches were provided for the two bulbs.
(a) In what way were the two fans and two sockets connected in the household circuit by the electrician ?
(b) What mistake was made by electrician in connecting the two bulbs in the circuit ?
(c) In addition to the problem of not being able to be switched on and switched on and switched off independently, What other problem could be observed easily in the working of two electric bulbs, if the mistake had not been corrected ?
(d) What values were displayed by Vikalp during this incident ?

Explanation

(a) The two fans and two sockets were connected correctly in parallel circuits.
(b) The two electric bulbs were connected wrongly in series in the circuit.
(c) The two electric bulbs would glow less brightly when connected in series because they would not get the same voltage of 220 volts of the mains supply line.
(d) Vikalp showed the values of (i) Curiosity ot check whether things worked properly or not (ii) Knowledge of household wiring, and (iii) Application of knowledge.