1. (i) The resistance of a wire of 0.02 cm radius is 30. If the material is tungsten of resistivity5.6x10-8Qm, what is the length of the wire?Answer :length of wire =%3D(ii) The following table shows the electrical appliances used by a person for every day.No.ElectricalNo. of Appliances Time of useAppliances1.Lamp (100W)10 hours/dayElectricHeater(1800W)2.4 hours/dayRefrigerator(150W)3.24 hours/dayCalculate the electricity bill of the household for the month if the cost per unit of electric energy is10 Bz/ kWh.(1) Total energy(in kWh) consumed in the month =kWh(2) Electricity bill(in riyals) for the month =riyals

Given data: Resistance of wire, R=3 Ω Radius of wire, r=0.02 cm=2×10-4m Resistivity of tungsten,…

1. (i) The resistance of a wire of 0.02 cm radius is 30. If the material is tungsten of resistivity 5.6x10-8Qm, what is the length of the wire? Answer : length of wire = (ii) The following table shows the electrical appliances used by a person for every day. No. Electrical No. of Appliances Time of use Appliances 1. Lamp (100W) 9. 10 hours/day 2. Electric 4 hours/day Heater(1800W) Refrigerator (150W) 3. 24 hours/day Calculate the electricity bill of the household for the month if the cost per unit of electric energy is 10 Bz/ kWh. (1) Total energy(in kWh) consumed in the month = kWh (2) Electricity bil|(in riyals) for the month = riyals

1. (i) The resistance of a wire of 0.02 cm radius is 30. If the material is tungsten of resistivity 5.6x10-8Qm, what is the length of the wire? Answer : length of wire = (ii) The following table shows the electrical appliances used by a person for every day. No. Electrical No. of Appliances Time of use Appliances 1. Lamp (100W) 9. 10 hours/day 2. Electric 4 hours/day Heater(1800W) Refrigerator (150W) 3. 24 hours/day Calculate the electricity bill of the household for the month if the cost per unit of electric energy is 10 Bz/ kWh. (1) Total energy(in kWh) consumed in the month = kWh (2) Electricity bil|(in riyals) for the month = riyals

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section17.6: Electrical Energy And Power

Problem 17.7QQ

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Similar questions

When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
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