Raja had gone to his aunt’s home in a foreign country, where domestic electric supply is DC. An electrician working in her kitchen was trying to locate the electric wiring in a particular wall for some electrical work but failed to do so. Electrician, then suggested the breaking of substantial position of wall to Rajat’s aunt.
But Rajat told his aunt that he could locate the position of current carrying wires in the kitchen without any breakage. He brought a small device from market and within ten minutes, located the position of all current carrying wires on wall of his aunt got very happy from him.
Read the above passage and answer the following questions:
(i) Which device was purchased by Rajat?
(ii) What was noticed by Rajat when he moved this device slowly over the current carrying wires embedded kitchen?
(iii) What values are shown by Rajat in this episode?
(i) Rajat has purchased a Compass because it contains the magnet and in presence of the electric current the needle in it deflects which helps in detecting the current carrying wires. Figure below shows the compass.
(ii) Rajat noticed the deflection in the needle of the compass when he was moving the device slowly over the wires. Actually due to interaction between the magnetic field of the compass and of the current carrying wires the deflection is produced.
(iii) Rajat is very aware and clever. He quickly brought the instrument to help his aunt this shows he is very helping and caring towards his aunt.