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chanller
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Hi everyone,
Can anyone please tell me if a battery delivers a constant power in any circuit!
Thanks
Can anyone please tell me if a battery delivers a constant power in any circuit!
Thanks
The power delivered by a battery depends on its emf E, internal r and external R resistences. If I remember well there is a given value of the external resistence for which the delivered (external) power is maximum (r=R?)chanller said:Hi everyone,
Can anyone please tell me if a battery delivers a constant power in any circuit!
Thanks
Its true for ideal batteries ( constant voltage source in series whit a constant resistance ).If I remember well there is a given value of the external resistence for which the delivered (external) power is maximum (r=R?)
chanller said:Hi everyone,
Can anyone please tell me if a battery delivers a constant power in any circuit!
Thanks
chanller said:Well, Voltage from real batteries is not constant: V=(E.M.F*R)/(R+r). Made some research! Thanks everyone!
chanller said:What value do I get if i connect a battery with a voltmeter? What do i get with an ammeter? Can I find the power rating of the battery using P=IV for the values obtained?
leright said:If you connect a battery (regardless of whether it is dead or alive) to a good voltmeter it will always show approximately the rated EMF of the battery.]
I think the battery should be "very good" i.e. having an infinite resistence.
bernhard.rothenstein said:leright said:If you connect a battery (regardless of whether it is dead or alive) to a good voltmeter it will always show approximately the rated EMF of the battery.]
I think the battery should be "very good" i.e. having an infinite resistence.
eh? a "very good" battery will have a relatively low internal resistance. Regardless of what the internal resistance is, a voltmeter with a very high resistance (approaching infinity) will show the EMF of the battery when connected.
A battery delivers power in a circuit by converting chemical energy into electrical energy. This electrical energy flows through the circuit, powering any components in its path.
No, the power output of a battery is not constant in a circuit. As the battery discharges, its voltage decreases, resulting in a decrease in power output. Additionally, the power output can vary depending on the components and their resistance in the circuit.
No, a battery cannot deliver more power than its rated capacity. The rated capacity of a battery is a measure of its energy storage, and exceeding this limit can damage the battery.
The resistance in a circuit affects the power output of a battery by decreasing the amount of current that can flow through the circuit. This results in a decrease in power output, as power is calculated by multiplying current and voltage.
Yes, the type of battery can affect its power output in a circuit. Different types of batteries have varying voltage and current capabilities, which can affect the power output in a circuit. Additionally, the chemical composition of the battery can also impact its power output.