Two batteries "A" and "B", each with emf= 10.5 (V) are connected in series configuration. Note that the positive terminal of "A" battery is connected to the negative terminal of "B" battery. Internal resistance of battery "A" is twice the internal resistance of battery "B". When an external resistance of R = 12.3 (Ω) is connected in series with the batteries, a current of I = 0.47 (A) flow in the circuit. (a) What is the internal resistance of battery "A"? (Ω) (b) What is the internal resistance of battery "B"? (Ω) (c) Explain how the internal resistance (r) could cause a power dissipation when a current (I) is passing in the circuit (hint: use the formula for energy delivered by battery to resistor)?
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
Two batteries "A" and "B", each with emf= 10.5 (V) are connected in series configuration. Note that the positive terminal of "A" battery is connected to the negative terminal of "B" battery. Internal resistance of battery "A" is twice the internal resistance of battery "B". When an external resistance of R = 12.3 (Ω) is connected in series with the batteries, a current of I = 0.47 (A) flow in the circuit.
(b) What is the internal resistance of battery "B"? (Ω)
(c) Explain how the internal resistance (r) could cause a power dissipation when a current (I) is passing in the circuit (hint: use the formula for energy delivered by battery to resistor)?
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