If the resistance of a small immersion heater (to heat water for tea or soup, Fig. 18–32) was increased, would it speed up or slow down the heating process? Explain. FIGURE 18–32 Question 8.
Q: A short circuit in a 120-V appliance cord has a 0.500- Ω resistance. Calculate the temperature rise…
A: Basic Details The amount of heat emitted by the appliance depends on the voltage, the resistance and…
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Q: Fiad the Porer Cin watts ) delivered to the Ro0 n resista Round your answn to 2 Necinalplares.
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A: Question : We have referred to resistors dissipating heat, i.e., we have assumed that P=I∆V is…
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A: Given: The power of the bulb is 50 W. The time interval is 10 s. The cost rate is 4 pesos/kWhr.
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A: Given data:Radius of the copper wire, R = 0.205 / 2 = 0.1025 cm = 0.001025 mArea, A = R2 = 3.14 x…
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Q: After the steady state , the temperature of a conductor doesnot rise , even though heat is supplied…
A: After the steady state, the temperature of a conductor does not rise, even though heat is supplied…
Q: A toaster has a Nichrome (a-4.5x10* °C) heating element that has a resistance of Ro- 80 n at a…
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Q: Four 60-W 110-V bulbs are to be operated from a 230-V source. Determine the value of the resistance…
A: Power of each bulb = 60 W Voltage across each bulb = 110 V Voltage of the source = 230 V
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- Explain why birds can sit on power lines safely, eventhough the wires have no insulation around them, whereasleaning a metal ladder up against a power line is extremelydangerous.- If the heater wire is replaced by a wire with lower resistance, is the time required to heat the gas (a) unchanged,(b) increased, or (c) decreased?Check Your Understanding Consider the electrical circuits in your home. Give at least two of circuits that must use a combination of series and parallel circuits to operate efficiently.
- Check Your Understanding How much energy does a 1.5-V AAA battery have that can move 100C ?A typical incandescent reading lamp runs at 60W. If it is lefton constantly, how much energy (J) is consumed per day,and what is the weekly cost if energy is charged at a rate of12.5 cents per kilowatthour?An electric water heater is designed to produce 48 kWkW of heat when it is connected to a 240-V source. If the heater is 88 %% efficient, how long would it take to heat 51 galgal of water from 20∘C∘C to 60 ∘∘? Express your answer using two significant figures.
- For the circuit shown in Fig.a 20.0 Ω resistor is embedded in a large block of ice at 0.00°C, and the battery has negligible internal resistance. At what rate (in g /s) is this circuit melting the ice?How much electrical energy (in kilowatt hours) would a 45.0 W light bulb use in 60.0 days if left on steadily?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?
- he resistance of a 25 watt bulb is ______ that of a 100 watt bulb, if both run on the same voltage.one fourthdouble four timesone halfA 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?Check Your Understanding Verify that /V and e0/d have the same physical units.