A voltmeter and an ammeter are connected in series to an ideal cell of `emf E`. The voltmeter reading is `V`, and the ammeter readings is `I`. Then
(i) `V lt E` (ii) the voltmeter resistance is `V// I`
(iii) the potential difference across the ammeter is `E - V`
(iv) Voltmeter resistance + ammeter resistance = E//I`
Correct statements are

Options

A. (i),(ii)
B. (ii),(iii)
C. (iii),(iv)
D. all

Answer

D

Explanation

`V_A + V = E`
`V = E - V_A`, (i) is O.K
`R_V = (V)/(I)`, (ii) is O.K
`V_A = E - V`, (iii) is O.K
`( E)/(I) = R_A + R_V`, (iv) is O.K.