The internal energy of the water in a container is increased by 440 kJ by means of an electric heater. Since the electric current passing through the heater is 5 Amperes and the operating time of the heater is 13 minutes and 20 seconds, how many volts is the voltage applied to the heater?

Q: If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost? (a) To…

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Q: What current (in A) must be produced by a 12.0 V battery-operated bottle warmer in order to heat…

A: Given data: Potential difference ΔV= 12 V Mass of glass mg=74 g=0.074 kg Specific heat of the glass…

Q: What current is used by the 220 V AC electric heater which heats 2 kg of water (c = 4200 J/(kg K))…

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Q: Why is it advisable to allow electric line to sag between poles?

A: Temperature plays an important role in the sagging of electric lines.

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Q: Which of the following equations is a mathematical statement of the Joule's Law of Resistive…

A: The joules law of resistive heating states that when a current I pass conductor for certain period…

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Q: A plane brick wall (k = 0.7 W/m⋅K) is 10 cm thick. The thermal resistance of this wall per unit of…

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Q: A toaster has a Nichrome (a-4.5x104 c) heating element that has a resistance of R 80 0 at a…

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Q: A resistor R and another resistor 2R are connected in parallel across a battery. If heat is produced…

A: A resistor R and another resistor 2R are connected in parallel across a battery. If heat is produced…

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Q: Calculate the energy cost of an electroplating process running at 0.65 V and 48.9 A for 3149 s…

A: Given: The potential difference is V=0.65 volt The current is I=48.9 A The duration of the…

Q: Which wire will conduct electricity with lesser resistance? a. shorter in length b. larger…

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Q: A toaster has a Nichrome (a=4.5x104 °C-) heating element that has a resistance of Ro= 80 Q at a…

A: Solution

Q: A 84 W freezer has an EER of 12.7. How much heat is exhausted to the room in 2.5 hours? |(include…

A: EER = 12.7 P = 84 W t = 2.5 hours t = 2.5 * 60 * 60 t = 9000 seconds

Q: Water flows through a shower head steadily at a rate of 10 L/min. An electric resistance heater…

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Q: When a metal rod is heated, not only its resistance but also its length and cross-sectional area…

A: The linear expansion,

Q: Given the following: Material: -copper Coefficient a (1/°C): -3.9x10^-3 Material: Constantan (Cu,…

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Q: In one form of plethysmograph (a device for measuring volume), a rubber capillary tube with an…

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Q: Calculate the energy cost of an electroplating process running at 0.51 V and 26.1 A for 3782 s…

A: Power P is given by, P = I V where I is current and V is voltage. Now, energy E=Power×Time Given,…

Q: 2. Bulb A is a 60 W incandescent bulb and bulb B is a 10 W LED bulb. Both bulbs produce 4.0W of…

A: Given: The reading of bulb A is 60 W. The reading of bulb B is 10 W. The output power is 4 W.

Q: An electric current of 5 A passing through a resistor has a measured voltage of 6 V across the…

A: Since the heat transfer rate equals the power generated, The resistor surface area is

Q: In the circuit shown, R,=R,=R, and ɛ2 =. The rate of heat dissipated by the whole circuit is 110…

A: From the given circuit diagram, when the batteries are ideal,

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Q: A 2.0 cm long tungsten filament in a florescent light bulb has a radius of 0.3 mm. Assume constant…

A: Given: length (l) = 2 ×10-3 m Resistivity (p) = 5.6 × 10-8 ohm m i) Cross sectional area (A) =…

Q: In the figure below, ℰ1 = 5.00 V, ℰ2 = 4.00 V, R1 = 1.00 Ω, R2 = 3.00 Ω, R3 = 3.00 Ω, and both…

A: Given: ℰ1 = 5.00 V,  ℰ2 = 4.00 V,  R1 = 1.00 Ω,  R2 = 3.00 Ω,  R3 = 3.00 Ω,

Q: The approximate number of Fridges in Italy is 90 thousand. If each is on standby for about 2 hours…

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Q: An electric heater is made by applying a potential difference of 100 V between the ends of a…

A: solution as

Q: In the circuit shown, R;=R,=R, and ɛz =4. The rate of heat dissipated by the whole circuit is 110…

A: Given that :- R1=R2=R  And E2=E1/2

Q: Figure 3 a) The Figure 3 shows a hollow copper cylinder. It is constructed by winding a non-…

A: Given:  Resistivity of copper = ρ = 1.7 ×10-8 m.Ω Radius of pipe = 5.5 cm = 0.055 m Cross section…

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Q: 1. A resistor R and another resistor 2R are connected in series across a battery. If heat is…

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