| ⇦ | 
| ⇨ |
A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection for 30 mA current. It is to work as a voltmeter of 30 volt range, the resistance required be added will be
Options
(a) 900Ω
(b) 1800Ω
(c) 500Ω
(d) 1000Ω
Correct Answer:
900Ω
Explanation:
Let the resistance to be added be R, then
30 = Ig (r + R)
R = 30 / Ig – r = 30 / 30 x 10⁻³ – 100
1000 – 100 = 900Ω
Related Questions: - In semiconductor at a room temperature
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- Two particles A and B having equal charges, after being accelerated
- To demonstrate the phenomenon of interference, we require two sources which emit
- When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In semiconductor at a room temperature
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- Two particles A and B having equal charges, after being accelerated
- To demonstrate the phenomenon of interference, we require two sources which emit
- When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply