| ⇦ | 
| ⇨ |
A current of 2A flows through a 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5A when connected across a 9Ω resistor. The internal resistance of the battery is
Options
(a) 0.5Ω
(b) 1/3Ω
(c) 1/4Ω
(d) 1Ω
Correct Answer:
1/3Ω
Explanation:
Let the internal resistance of the battery be r. Then the current flowing through the circuit is given by
i = E / R + r
In first case, 2 = E / 2 + r …(i)
In second case, 0.5 = E / 9 + r … (ii)
From (i) & (ii), 4 + 2r = 4.5 + 0.5r
1.5r = 0.5
r = 1/3Ω
Related Questions: - In a photoelectric effect experiment, the slope of the graph between the stopping
- The half life of radioactive isotope ‘X’ is 50 years. It decays to
- In Raman effect, Stoke’s lines are spectral lines having
- Which of the following is suitable for the fusion process?
- A satellite in a circular orbit of radius R has a period of 4 hours. Another satellite
Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a photoelectric effect experiment, the slope of the graph between the stopping
- The half life of radioactive isotope ‘X’ is 50 years. It decays to
- In Raman effect, Stoke’s lines are spectral lines having
- Which of the following is suitable for the fusion process?
- A satellite in a circular orbit of radius R has a period of 4 hours. Another satellite
Topics: Current Electricity (136)
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