First slide

ammeter

Question

An ammeter gives full deflection when a current of 2 A flows through it. The resistance of ammeter is $12 Ω$ If the same ammeter is to be used for measuring a maximum current of 5 A, then the ammeter must be connected with a resistance of

Moderate

A

$8 Ω$ in series
B

$18 Ω$ in series
C

$8 Ω$ in parallel
D

$18 Ω$ in parallel

Solution

$\frac{i}{i_{g}} = 1 + \frac{G}{S} \Rightarrow \frac{5}{2} = 1 = \frac{12}{S} \Rightarrow S = 8 Ω (I n p a r a l l e l)$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App