A student is asked to connected four cells of e.m.f of 1 V and internal resistance 0.5 ohm in series with an external resistance of 1 ohm. But one cell is wrongly connected by him with its terminal reversed. the current in the circuit is
Added by Saraf S.
Step 1
We have four cells each with an emf of 1 V. Normally, they each add +1 V when connected in series. Because one cell is connected with its terminal reversed, it contributes effectively -1 V. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Rajendra Kumar and 91 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The current flowing an external resistance of 4 ohm is 1 A, when it is connected to the terminals of a cell. this current reduces to 0.5 A, when the external resistance is 12 ohm. the e.m.f. of cell is :
Rajendra K.
Kajal R.
The e.m.f. of a cell is E volts and its internal resistance is r ohms. It is connected with an external resistance of r ohms. The potential difference across the terminals of the cell will be: (i) E volts (ii) 2E volts (iii) E/2 volts (iv) E/4 volts.
Sri K.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD