Are These Resistor Problem Calculations Correct?

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In summary, a resistor is an electronic component that resists the flow of electric current in a circuit. It is made of materials with high resistance and is used to control the amount of current, reduce voltage, and protect components from damage. The resistance of a resistor can be calculated using Ohm's Law or the color code on the resistor. Series circuits have all components connected in a single loop, while parallel circuits have multiple branches. To check answers for a resistor problem homework, use Ohm's Law and the color code or consult with a classmate or teacher.
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temaire
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Homework Statement



http://img214.imageshack.us/i/124w.png/

Homework Equations



[tex]\[R = \frac{V}{I}\][/tex]

[tex]P=VI[/tex]



The Attempt at a Solution



a) Using KVL around the loop, I got [itex]V_{R}=6.3 V [/itex].
Then I used [itex]\R = \frac{V}{I}\[/itex] and got R = 1.4 ohms.

b)I used [itex]P=VI[/itex] and got P = 28.35 W.

Are my answers correct?
 
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hi temaire! :smile:

(btw, LateX here doesn't like extraneous "\"s :wink:)
temaire said:
Are my answers correct?

looks good! :biggrin:
 

FAQ: Are These Resistor Problem Calculations Correct?

What is a resistor?

A resistor is an electronic component that is designed to resist the flow of electric current in a circuit. It is typically made of a material that has high resistance, such as carbon or metal, and is used to control the amount of current flowing through a circuit.

Why do we use resistors in circuits?

Resistors are used in circuits for a variety of reasons, including controlling the amount of current flowing through a circuit, reducing the voltage, and dividing the voltage in a circuit. They are also used to protect components from being damaged by excessive current.

How do you calculate the resistance of a resistor?

The resistance of a resistor can be calculated using Ohm's Law: R = V/I, where R is resistance in ohms, V is voltage in volts, and I is current in amps. You can also use the color code on the resistor to determine its resistance value.

What is the difference between series and parallel circuits?

In a series circuit, all components are connected in a single loop, and the same current flows through each component. In a parallel circuit, the components are connected in multiple branches, and the current is divided among them. In a series circuit, the voltage is divided among the components, while in a parallel circuit, the voltage across each component remains the same.

How do I check my answers for a resistor problem homework?

The best way to check your answers for a resistor problem homework is to use Ohm's Law and the color code on the resistor. Make sure you have the correct values for voltage, current, and resistance, and then use the color code to confirm the resistance value. You can also use an online calculator or consult with a classmate or teacher for help.

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