A 28 V DC aircraft supply delivers a charge of 5 C to a window heater every second. What is the resistance of the heater?
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Q: An electric heater is constructed by applying a potential difference of 104 V across a wire with a…
A: Given: The applied potential difference is, V=104 V Resistance, R=5 Ω
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A: Given: V1=8.5 V I1=3A V2=11 V I2=-2A (Minus sign is used for reverse direction)
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- Which of the following is the best insulator? a. wood b. thermoplastic c. copper d. cast ironEvery device in a DC, whether a light or electric motor, can be replaced by an electric ________?a.) resistorb.) loadsc. receiverd. conductanceA 1500 Watt space heater will draw 12.5 Amps (12.5 A) when plugged into a 120 V line.a) What is the heater’s resistance?b) How much charge passes through the heater in 15 minutes? (Assume direct current,DC)
- An electric heater is constructed by applying a potential difference of 104 V across a wire with a resistance of 5.0 ohm. What is the power rating of the heater?An electric heater having power rated 1000W connected to a 240V supply for 10minutes. a) Determine the heat energy produced of the electric heater. b) Calculate current taken from the supply. c) Find the resistance value of the heater element. d) Calculate the conductance of the heater element. e) Find the nett charge flowing in the heater element. f) Calculate the no. of free electron that represent for that amount charge obtained.During its use, the temperature of the aluminum wire has increased from room temperature to 80 degree Celsius. Calculate the increase in the resistivity of the aluminum wire. The resistivity of the aluminum at room temperature (20 degree C) is 2.75 x 10^(-8) ohm-meter, and the temperature coefficient of resistivity is 0.00039/degree C.
- A 2-kW electric iron is connected to a 120-V line. Calculate the current drawn by the iron. A coil of copper wire has a resistance of 100Ω when its temperature is 0°C. Determine its resistance at 70°C if the temperature coefficient of resistance of copper at 0°C is 0.0043/°C.An electric heater having power rated 1000W connected to a 240V supply for 10minutes. a) calculate the conductance of the heater element.b) Find the nett charge flowing in the heater element.c) Calculate the no. of free electron that represent for that amount charge obtained.2. A coil of copper wire has a resistance of 20 at 18°C. If the temperature coefficient of resistance of copper at 18°C is 0.004/°C, determine the resistance of the coil when the temperature rises to 98°C?
- The resistance of a given device is 46ohms at 25degrees celcius. If the temperature coefficient of resistance of the material is 0.00454 at 20degrees celius, determine the temperature of the device when its resistance is 92ohms.1.) An incandescent lamp, rated at 100 watts, gives a certain amount of light when placed across the 120V ac power line. Would the amount of light increase, decrease or remain the same, when the lamp is placed across a 120V dc power line? Discuss. 2.) Explain what is meant by effective current and effective voltage.How can you explain scientifically the generation of high voltage to feed the ignition plugs in car engine about 11KV while the voltage source is a battery 12V
