How do you find current from resistance and EMF?
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How do you find current from resistance and EMF?
Internal resistance of a cell. This shows that we can calculate the EMF if we know the voltage across the terminals, the current flowing and the internal resistance of the cell….The Formula for Calculating the EMF.
| \varepsilon | electromotive force |
|---|---|
| E | the energy in the circuit |
| Q | Charge of the circuit. |
What are the EMF and internal resistance of the battery?
The emf is the potential difference of a source when no current is flowing. The numerical value of the emf depends on the source of potential difference. The internal resistance r of a voltage source affects the output voltage when a current flows.
Is EMF the same as resistance?
Definition. The potential difference across the poles of a cell when no current is being taken from it is called the electromotive force (EMF) of the cell. If the external resistance is R and the internal resistance is r, the total resistance of the circuit is R+r, so that the current that flows is E/(R+r).
How do you calculate voltage current and resistance?
From this, we conclude that; Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR).
What is the current when a battery of EMF 10V is connected?
> A battery of emf 10 V and i… A battery of emf 10 V and internal resistance 3 ohm is connected to resistor. The current in the circuit is 0.5 amp. The terminal voltage of the battery when the circuit is closed,is
What is the current when a 10V battery is connected to resistor?
A battery of emf 10 V and internal resistance 3 ohm is connected to resistor. The current in the circuit is 0.5 amp. The terminal voltage of the battery when the circuit is closed,is
What is the internal resistance of a 12 volt battery?
Two batteries with e.m.f. 12 V and 13 V are connected in parallel across a load resistor of 10Ω. The internal resistance of the two batteries are 1Ω and 2Ω respectively. The voltage across the load lies between.
What is the internal resistance of a 10 ohm resistor?
A resistor of 10 ohm connected across a cell of EMF of 12 V, draws a current of 1.1A. What is the internal resistance of the cell? – Quora A resistor of 10 ohm connected across a cell of EMF of 12 V, draws a current of 1.1A.