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4, A 120 V potential difference is applied to a space heater whose resistance is 14...
A 120 V potential difference is applied to a space heater whose resistance is 15.7 Ω when hot. A. At what rate is electrical energy being transferred to thermal energy? B. How much thermal energy is produced in 3.3 hours? C. If costs 10.0 cents per kW·h, how much does it cost to operate the device for 3.3 hours? (Give your answer in dollars, but do not include the dollar sign.)
Chapter 26, Problem 041 A 120 V potential difference is applied to a space heater whose resistance is 15 Ω when hot. (a) At what rate is electrical energy transferred to thermal energy? (b) What is the cost for 5.5 h at US$0.05/kW·h?
Chapter 26, Problem 053 A 120 V potential difference is applied to a space heater that dissipates 708 W during operation. (a) What is its resistance during operation? (b) At what rate do electrons flow through any cross section of the heater element? (a) Number Uriiii (b) Number Units
A 1720 W radiant heater is constructed to operate at 120 V. (a) What will be the current in the heater? (b) What is the resistance of the heating coil? (c) How much thermal energy is generated in 1.0 h?
In the figure a potential difference of V = 120 V is applied across a capacitor arrangement with capacitances C1 = 8.88 UF, C2 = 7.45 pF, and C3 = 12.0 pF. What are (a) charge 43, (b) potential difference V3, and (c) stored energy Uz for capacitor 3, (d) 91, (e) Vu, and (f) U, for capacitor 1, and (g) 92, (h) V2, and (i) U2 for capacitor 2 Cg
In the figure a potential difference of V = 120 V is
applied across a capacitor arrangement with capacitances
C1 = 12.3 µF, C2 = 7.39 µF,
and C3 = 14.1 µF. What are (a)
charge q3, (b) potential
difference V3, and (c) stored
energy U3 for capacitor 3, (d)
q1, (e)
V1, and (f)
U1 for capacitor 1, and (g)
q2, (h)
V2, and (i)
U2 for capacitor 2
C2 CL C3
In
the figure a potential difference V = 120 V is applied across a
capacitor arrangement with capacitances C1 = 14.3 µF, C2 = 4.40 µF,
and C3 = 4.43 µF. What are (a) charge q3, (b) potential difference
V3, and (c) stored energy U3 for capacitor 3, (d) q1, (e) V1, and
(f) U1 for capacitor 1, and (g) q2, (h) V2, and (i) U2 for
capacitor 2?
Chapter 25, Problem 034 In the figure a potential difference V...
Part A : The resistance of an electric heater is 90 Ω when connected to 120 V. How much energy does it use during 15 min of operation? (answer in J) Part B : The lightbulb used in a computer projector has a resistance of 71 Ω. What is the current through the bulb when it is operating on 120 V? ( answer in A )
A wire of resistance 3.0 Ω is connected to a battery whose emf ℰ is 2.0 V and whose internal resistance is 1.0 Ω. (a) How much energy in J is transferred from chemical to electrical form in 3.0 min? (b) How much energy in J appears in the wire as thermal energy in that time?
8c26p58) A potential difference of 4.20 V will be applied to a 35.00 m length of 18-gauge silver wire (diameter = 0.0400inches). Calculate the current. Calculate the current density. Calculate the electric field. Calculate the rate at which thermal energy will appear in the wire.