Does internal resistance change with current?
As current decreasesd, voltage across the internal resistance of the cell, Ir, decreased (using V=IR), because internal resistance should remain constant. Therefore voltage across the terminals increased (as less is wasted across the internal resistor).
Does internal resistance depend on external resistance?
Generally, the external resistance should be comparable to the internal resistance. However, during the starting stage, the internal resistance is supposed to gradually decrease due to the development of functional microbial film on electrodes.
What happens to internal resistance when we increase external resistance?
When the external resistor increases in temperature, why is the calculated value for internal resistance higher? The 10 ohm resistor then increases in temperature, leading to an increase in resistance in this resistor. Since your emf is constant, less voltage must drop across the internal resistor.
What is the difference between internal and external resistance?
Answer. internal resistance is the rsisitance offered by the electrolyte to the flow of electrons. external resistance is the resistance offered to the flow of electricity in the external circuit.
What is the internal resistance of a 12.0 V?
A 12-V car battery has an internal resistance of 0.020 Ω. When the headlights and stereo are on, a current of 25.0 A is drawn from the battery. What is the value of the terminal voltage when this current is drawn from the battery? 12 V, 9.0 V, 12.5 V, or 11.5 V 2.
What is the minimum resistance you can obtain?
Hence, the minimum resistance which can be made using five resistors each of 1/5 ohms is 1/25 ohms.
What is the maximum and minimum resistance which can be made using five resistors each of 1/5 Ω?
What is the minimum and maximum resistance can be obtained by using the identical resistor of resistance of 1/5 Ω?
Minimum resistance is obtained in parallel combination. Thus, Rp=(1/5Ω)5=(1/25)Ω.
What is the maximum resistance which can be made using 5 resistors each of 1 by 10 ohm?
The maximum resistance of five resistors is 1 ohm. Thus, the resultant resistance of five resistors is 1 ohm. #Learn More: Topic: Combination of resistances.