Question

A voltmeter had graduation 0, 0.5, 1.0 and 1.5. A student noticed that the pointer of the voltmeter was indicating the third graduation mark after 0 mark even when the circuit was open. The space between 0 mark and 0.5 mark was divided into 10 equal divisions. The zero error in the voltmeter was : 1
(A) + 0.3 V (B) + 045 V
(C) — 045 V (D) — 0.30 V


CBSE Class X Science VSA (1 Mark)

Answer 1

(B) The zero error will be + 0·15 V.

Answer 2

each small division between 0 and 0.5 mark, means  0.05 volts.
so 3rd mark means 0.15 Volts.   zero error.