An ammeter of resistance 1.0Ω Ω has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111Ω Ω is...

Question 1 Report

An ammeter of resistance 1.0 $Ω$ has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111 $Ω$ is connected across its terminals.

400mA

450mA

500mA

550mA

Answer Details

V = 0.1 x 50 x 10-3 = 5 x 10-3volts

RT = $\frac{0.1 \times 0.0111}{0.1 + 0.0111}$

= 9.99 x 10-3 $Ω$

V = IR $\Rightarrow$ I

= $\frac{5 \times 10^{- 3}}{9.9 \times 10^{- 3}}$

= 0.5A ; = 500mA

Read lesson note on Current Electricity (JAMB)

Current Electricity

View Answer

Download The App On Google Playstore

Everything you need to excel in JAMB, WAEC & NECO

Personalized AI Learning Chat Assistant

Thousands of JAMB, WAEC & NECO Past Questions

Over 1200 Lesson Notes

Offline Support - Learn Anytime, Anywhere

Green Bridge Timetable

Literature Summaries & Potential Questions

Track Your Performance & Progress

In-depth Explanations for Comprehensive Learning