A) The label on a certain small appliance states that the ap…
A) The label on a certain small appliance states that the appliance carries a current of 5.00 A when connected to a source of 120 V. What is the resistance of the appliance? (5 points) B) A tungsten wire has a cold resistance of 0.350 Ω at 20o C. If the temperature is increased from room temperature ( 20oC ) to 2000o C , what is the resistance of the wire? Temperature coefficient of resistivity for Tungsten is 4.5×10−3/oC (5 points) C) What is the resistance of a 15.0 m long piece of 12-guage copper wire having a 3.50 mm diameter? Resistivity of copper is 1.72 x 10-8 Ohm meter. (5 points) D) How much power is dissipated in a short circuit of 240 V AC through a resistance of 0.750 Ohms? (5 points) E) An electric water heater consumes 6.00 kW for 3.00 hours per day. What is the cost of running it for 30 days if electricity costs 12.0 cents/kW.h ? (5 points)
A) The label on a certain small appliance states that the ap…
Questions
A) The lаbel оn а certаin small appliance states that the appliance carries a current оf 5.00 A when cоnnected to a source of 120 V. What is the resistance of the appliance? (5 points) B) A tungsten wire has a cold resistance of 0.350 Ω at 20o C. If the temperature is increased from room temperature ( 20oC ) to 2000o C , what is the resistance of the wire? Temperature coefficient of resistivity for Tungsten is 4.5×10−3/oC (5 points) C) What is the resistance of a 15.0 m long piece of 12-guage copper wire having a 3.50 mm diameter? Resistivity of copper is 1.72 x 10-8 Ohm meter. (5 points) D) How much power is dissipated in a short circuit of 240 V AC through a resistance of 0.750 Ohms? (5 points) E) An electric water heater consumes 6.00 kW for 3.00 hours per day. What is the cost of running it for 30 days if electricity costs 12.0 cents/kW.h ? (5 points)
A) The lаbel оn а certаin small appliance states that the appliance carries a current оf 5.00 A when cоnnected to a source of 120 V. What is the resistance of the appliance? (5 points) B) A tungsten wire has a cold resistance of 0.350 Ω at 20o C. If the temperature is increased from room temperature ( 20oC ) to 2000o C , what is the resistance of the wire? Temperature coefficient of resistivity for Tungsten is 4.5×10−3/oC (5 points) C) What is the resistance of a 15.0 m long piece of 12-guage copper wire having a 3.50 mm diameter? Resistivity of copper is 1.72 x 10-8 Ohm meter. (5 points) D) How much power is dissipated in a short circuit of 240 V AC through a resistance of 0.750 Ohms? (5 points) E) An electric water heater consumes 6.00 kW for 3.00 hours per day. What is the cost of running it for 30 days if electricity costs 12.0 cents/kW.h ? (5 points)
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