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- A short circuit in a 120-V appliance cord has a0.500- resistance. Calculate the temperature rise of the2.00 g of surrounding materials, assuming their specific heat capacity is 0.200cal/gC and that it takes 0.0500 sfor a circuit breaker to interrupt the current. Is this likely to be damaging?A battery with an emf of 24.00 V delivers a constant current of 2.00 mA to an appliance. Haw much work does the battery do in three minutes?A 0.50-W, 220- resistor carries the maximumcurrent possible without damaging the resistor. If the current were reduced to half the value, what would be the power consumed?
- A handheld electric fan operates on a 3.00-V battery. If the power consumed by the fan is1.77 W, what is the current supplied by the battery?The resistance of electric heater is 13 Ohm when connectedto 120 V What is the power consumption of the heater?A 240-V clothes dryer draws a cur-rent of 15A. How much power (in watts) and energy (in Joules) does ituse in 45 min of operation?
- The tungsten filament in the incandescent lamp has a resistance of8.4 Ω at a room temperature of 20°C and a resistance of 106 Ω atnormal operating temperature. Calculate the temperature of theheated filament.An electric heater is constructed by applying a potential difference of 120 V across a Nichrome wire that has a total resistance of 8.00 ohms. Find the current carried by the wire?a heater is left on and uses 0.58 A when plugged into a 120 V line. if electric power costs 12 cents per kilowatt hour, what is the cost of runnign the heater for 240 hours?
- Suppose your portable DVD player draws a current of 350 mA at 6.00 V. How much power does the player require?A short circuit in a 120-V appliance cord has a 0.500- Ω resistance. Calculate the temperature rise of the 2.00 g of surrounding materials, assuming their specific heat capacity is 0.200 cal/g⋅ºC and that it takes 0.0500 s for a circuitbreaker to interrupt the current. Is this likely to be damaging?A certain laboratory experiment requires an aluminum wireof length of 32.0 m and a resistance of 2.50 Ω at 20.0°C. Whatdiameter wire must be used?