alleryWhy does an ammeter have very low resistance?
ATo produce a large potential difference across itself
BTo avoid significantly changing the current in the circuit
CTo store electrical energy efficiently
DTo work only in parallel combination
Answer & Solution
Correct answer: B. To avoid significantly changing the current in the circuit
An ammeter should measure current without altering it appreciably.
**Therefore, it is designed with very low resistance so that the potential drop across it is very small and the circuit current remains nearly unchanged.**
Keep practising Effects of Electric Current
Browse all Effects of Electric Current questions for JEE Advanced, or explore more Science topics.
Related questions
A circular coil of radius $R$ carries current $I$. The magnetic field at the centre of theThree identical resistors, each of resistance $R$, are connected in **parallel**. The equiOhm's law states that, for an ohmic conductor at constant temperature:What is the electric field at the centre of a hollow conducting sphere of radius $R$ carryFor a conductor obeying Ohm's law, which equation correctly relates potential difference $The quantity $R = \dfrac{V}{I}$ for a conductor is called itsOhm's law is valid under the condition that theIf the potential difference across an ohmic conductor is doubled while temperature remains