- 1(current)
Q. No.A battery of internal resistance r, when connected across \(2~\Omega\) resistor supplies a current of 4 A. When the battery is connected across a \(5~\Omega\) resistor, it supplies a current of 2 A. The value of r is:
| 1. | \(2~\Omega\) | 2 | \(1~\Omega\) |
| 3. | \(0.5~\Omega\) | 4. | Zero |
Subtopic: EMF & Terminal Voltage |
82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
A student measures the terminal potential difference \(V\) of a cell (of emf \(
E\) and internal resistance \(R\)) as a function of the current \(I\) flowing through it. The slope and intercept of the graph between \(V\) and \(I\), respectively, is equal to:
1. \(E\) and \(-r\)
2. \(-r\) and \(E\)
2. \(-r\) and \(E\)
3. \(r\) and \(-E\)
4. \(-E\) and \(r\)
Subtopic: EMF & Terminal Voltage |
69%
From NCERT
AIPMT - 2009
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharges is 14 V. The "Watt hour" efficiency of the battery is:
1. 80%
2. 90%
3. 87.5%
4. 82.5%
Subtopic: EMF & Terminal Voltage |
68%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown below. Which one of the following is true?
| 1. | Potential difference across the terminals of the battery is maximum when R = r. |
| 2. | Power delivered to the resistor is maximum when R = r. |
| 3. | Current in the circuit is maximum when R = r. |
| 4. | Current in the circuit is maximum when R >> r. |
Subtopic: EMF & Terminal Voltage |
64%
From NCERT
PMT - 1995
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.