Name: R 2008-03-25 21:48
Anyone good at physics/electricity?
A certain appliance running at 240 V consumes 325 W of power. How much energy does it use in one hour?
The answer is in Joules
Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead. Direct current is the kind of electric current you are studying in this chapter. A certain direct-current power transmission line has a resistance of 0.255 Ω/km. 812 kV of potential drives the current from the generating station to a city located 125 km from the plant. What is the power loss due to resistance in the line?
The Answer is in Watts
and last but not least.....
A length of nichrome wire (composed of nickel and chromium) is 75.0 cm long and has a rectangular cross section measuring 0.700 mm by 0.500 mm. The resistivity of nichrome is 1.08×10−6 W×m. If a potential difference of 225 V is applied between the two ends of the wire, how much current flows through it?
Answer is in Amperes
A certain appliance running at 240 V consumes 325 W of power. How much energy does it use in one hour?
The answer is in Joules
Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead. Direct current is the kind of electric current you are studying in this chapter. A certain direct-current power transmission line has a resistance of 0.255 Ω/km. 812 kV of potential drives the current from the generating station to a city located 125 km from the plant. What is the power loss due to resistance in the line?
The Answer is in Watts
and last but not least.....
A length of nichrome wire (composed of nickel and chromium) is 75.0 cm long and has a rectangular cross section measuring 0.700 mm by 0.500 mm. The resistivity of nichrome is 1.08×10−6 W×m. If a potential difference of 225 V is applied between the two ends of the wire, how much current flows through it?
Answer is in Amperes