Battery, emf , r, and voltage

In summary, the conversation discussed the emf and internal resistance of a torch battery and asked for the voltage measurement when connected to a bulb drawing 0.5 A. The person then thanked the helpers for the solution and suggested adding "[SOLVED]" to the thread title for future reference.
  • #1
Libra_girl
14
0

Homework Statement



A torch battery has an emf of 6.0V and an internal resistance of 1 Ohms. What is the voltage measured by a voltmeter connected across the terminals of the battery, when the battery is connected to a bulb that draws 0.5 A from the battery?

Anyways thanks I solved it.
 
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  • #2
For future reference, if you're satisfied that you've figured out the problem and are satisfied with the answer, edit your thread title to include the word "[SOLVED]" at the start of it. This will let the helpers know that you're all right and they won't need to open your zero-reply thread. Thanks!
 

1. What is a battery?

A battery is a device that converts chemical energy into electrical energy. It typically consists of one or more electrochemical cells connected together to produce a voltage and supply power to electrical devices.

2. What is emf?

Emf stands for electromotive force, which is the amount of electrical energy that a battery can supply to an external circuit. It is measured in volts (V) and is essentially the force that pushes the electrons through the circuit.

3. What is the difference between emf and voltage?

Emf is the potential difference between the two terminals of a battery when it is not connected to a circuit, while voltage is the potential difference between two points in a circuit. Emf is the maximum voltage a battery can produce, while voltage is the actual potential difference experienced in a circuit.

4. What is the role of resistance (R) in a circuit?

Resistance is a measure of the opposition to the flow of electric current in a circuit. It is caused by factors such as the material of the wire, its length, and its cross-sectional area. Resistance reduces the amount of current that can flow through a circuit and is measured in ohms (Ω).

5. How do I calculate voltage in a circuit?

Voltage can be calculated by using Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). This can be written as V = IR. Voltage can also be calculated by using a voltmeter to measure the potential difference between two points in a circuit.

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