question_answer

While carrying out an experiment, to find the equivalent resistance of two resistances connected in parallel, a student sets up the circuit as shown. The teacher checks it and tells him that his circuit has one or more of the following 'faults'.

(i) The resistors \[{{R}_{1}}\] and \[{{R}_{2}}\] have no been correctly connected in parallel

(ii) The voltmeter has not been correctly connected in the circuit

(iii) The ammeter and the key have not been correctly connected in the circuit.

Out of these three, the actual fault in hi circuit is/are

A) Both (i) and (ii)

B) Both (ii) and (iii)

C) (i) only

D) (ii) only

Correct Answer: A

Solution :

Resistors\[{{R}_{1}}\]and\[{{R}_{2}}\]should be connected in parallel with each other. Voltmeter should be connected in parallel to both \[{{R}_{1}}\]and\[{{R}_{2}}\]. The ammeter and the key have been correctly connected in the circuit.