To verify Ohm's law, a student is provided with a test resistor `R_T`, a high resistance `R_1`, a small resistance `R_2`, two identical galvanometer `G_1 and G_2`, and a variable voltage source V. The correct circuit to carry out the experiment is

Options

A.
B.
C.
D.

Answer

C

Explanation

(c) The following points should be considered while making
the circuit:
(i) An ammeter is made by connecting a low resistance `R_2`
in parallel with the galvanometer `G_2`.

(ii) A voltmeter is made by connecting a high resistance `R_1`
in series with the galcanometer `G_1`.

(iii) Voltmeter is connected in parallel with the test resistor
`R_T`
(iv) Ammeter is connected in series with the test resistor
`R_T`.
(v) A variable voltage source V is connected in series with
the test resistor `R_T`.