1. Two resistors with values of 25 ? and 45 ?, respectively, are connected in se

Question

1. Two resistors with values of 25 ? and 45 ?, respectively, are connected in series and hooked to a 12 V battery. What is the current drawn from the battery in amperes?

2.A car radio draws 0.25 A of current in the auto's 12V electrical system. How much power in watts does the radio use? What is the effective resistance of the radio in ohms?

3. If an electrical component with a resistance of 60 ? is connected to a 110 V source, how much current flows through the component in Amperes?

4. A current of 2.0 A flows in a conductor for 10s. How much charge in coulombs passes a given point in the conductor during this time?

Explanation / Answer

1.

when you resolve a series circuit you can sum the resistance. and I = v/(R1 +R2)

I=12/(25+45)

I=0.1714 A

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2.

R= V/I ------> R=12/0.25 R= 48

w= R*I^2

w= 48*(0.25^2)

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