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Batteries are recharged by connecting them to a power supply (i.e., another battery) of greater emf in such a way that the current flows into the positive terminal of the battery being recharged, as was shown in Example 12. This reverse current through the battery replenishes its chemicals. The current is kept fairly low so as not to overheat the battery being recharged by dissipating energy in its internal resistance. Suppose the real battery of Figure 1 is rechargeable. What emf power supply should be used for a 0.75 A recharging current?

Respuesta :

The emf power supply should be used for a 0.75 A recharging current is 2.25 V.

What is current?

The current is the stream of charges which flow inside the conductors when connected across the end of voltage.

Given is the battery having 1.5 V open circuit potential and internal resistance of 1 ohm.

From the Ohm's law, V =IR

R = V/I

Here, R is the proportionality constant.

To charge current I = 0.75 A

Voltage V = 0.75A x 1 ohm = 0.75 V

Total potential required is

= 1.5 +0.75

= 2.25 V

Thus, the emf power supply should be used for a 0.75 A recharging current  is 2.25V.

Learn more about current.

brainly.com/question/10677063

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