- #1
exitwound
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Problem 1
Just starting on the Current & Power chapter and I'm a little confused. I know they're just basic definitions and concepts, but I'm having trouble wrapping my head around it. Easy questions follow, but I'm lost.
How many electrons flow past a point in a wire each second if the wire has a current of 1.00 Amperes?
1 Ampere = 1 Coulomb/1 second
Avogadro's number = 6.02x10^23
I don't know where to start.
Problem 2
A lamp draws 0.50 A from a 120 V generator. (a) How much power does the generator deliver to the lamp? (b) How much electric energy does the lamp convert to light and heat in a period of 5.0 minutes?
P=Energy/time or dU/dt or current*Voltage.
a.) P=current*Voltage
P= (.5 Amps)(120 Volts)= 60 Watts
b.) I don't know where to start with this.
Maybe I'm just missing some key concepts, or something just isn't sticking in my stupid head due to the way it's been explained. I don't know.
Any help?
Just starting on the Current & Power chapter and I'm a little confused. I know they're just basic definitions and concepts, but I'm having trouble wrapping my head around it. Easy questions follow, but I'm lost.
Homework Statement
How many electrons flow past a point in a wire each second if the wire has a current of 1.00 Amperes?
Homework Equations
1 Ampere = 1 Coulomb/1 second
Avogadro's number = 6.02x10^23
The Attempt at a Solution
I don't know where to start.
Problem 2
Homework Statement
A lamp draws 0.50 A from a 120 V generator. (a) How much power does the generator deliver to the lamp? (b) How much electric energy does the lamp convert to light and heat in a period of 5.0 minutes?
Homework Equations
P=Energy/time or dU/dt or current*Voltage.
The Attempt at a Solution
a.) P=current*Voltage
P= (.5 Amps)(120 Volts)= 60 Watts
b.) I don't know where to start with this.
Maybe I'm just missing some key concepts, or something just isn't sticking in my stupid head due to the way it's been explained. I don't know.
Any help?