An engineer needs to construct a high-voltage transmission line 200 km long. The line will be constructed from alu- minum wire and must have a resistance less than 6.00. (a) What diameter of cable should be used? (b) If the cable carries a current of 750 A, how much power is lost to Joule heating? (c) Critical Thinking: Is this a good solution to the problem? How much would the cable weigh? How much would it cost? Is there a better solution?

Q: Consider a 1100 W, 120 V megatoaster that perfectly toasts bread every time. a) What is its…

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Q: An engineer wishes to replace a 2.00 m wire with a 35.0 cm wire and use a 11.0 V supply instead of…

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Q: A cell balances against a length of 200 cm on a potentiometer wire, when it is shunted by a…

A: We need to compute-Balancing length (L)=?Internal resistance (r)=?The data given as-L1=200 cmR1=8…

Q: Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0,5…

A: The given data are: V=4.5 Vd=0.5 mm=0.0005 mP=20 Wρ=1.7×10-8 Ω.m

Q: Consider a portable electric blanket that runs on a 6 V battery. If you use copper wire with a 0.5…

A: Let P be defined as the power. Then, P=V2R=V2ρLA            ∵R=ρLA=AV2ρL=πr2V2ρL Here, r is the…

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Q: When a resistance of 100N is connected in series with a galvanometer of resistance R, its range is…

A: To find-Value of R1=100 ΩResistance of galvanometer G=RNew voltage (V1)=VNew voltage (V2)=2V1=2VNew…

Q: A cell balances against a length of 200 cm on a potentiometer wire, when it is shunted by a…

A: To find-L=?r=?Given-L1=200 cmR1=8 ohmL2=160 cmR2=4 ohm

Q: A flashlight uses batteries that add up to 4.5 V and has a power output of 0.55 W. (a) How much…

A: P=I2RI=PR=0.55 W4.5 V=0.35 A

Q: Nichrome wire is used in some radiative heaters. (a) Find the resistance (in Ω) needed if the…

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Q: (a) What current is needed to transmit 1.00×102 MW of power at 10.0 kV? (b) Find the resistance of…

A: Electric power: Power (P) is the product of current and voltage.      P = IV or P = V2R or P =I2R…

Q: A large TV works properly under the voltage of 110 V with power P = 1940 W. (a)  Calculate the…

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Q: A 120 V potential difference is applied to a space heater whose resistance is 17 Q when hot. (a) At…

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Q: only. A cen of emf 1.5 V gives a current of 15 A when connected directly to an ammeter of 0.04 Sa…

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Q: how long should the wire

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Q: A toaster operating on 120 V uses a current of 9.3 A. (a) What is the toaster's power consumption? W…

A: Write a given values of this question. V=120VI=9.3At=7min=7×60s=420s

Q: A pocket calculator draws 0.40 A of current when connected to a 6.0 V battery. At what rate does the…

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Q: 1.When lighted, a 100-watt light bulb operating on a 110-volt household circuit has a resistance of

A: As per guideline I m solving the first one, relation between power and resistance.

Q: Consider the circuit in the figure. 20 Ω 20 N 60 Ω 10 Q (a) Find the equivalent resistance of this…

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Q: A simple ohmmeter is made by connecting a 2.50 V battery in series with a resistance R and an…

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Q: (a) What is the resistance of a 190 N, a 2.50 kN, and a 4.10 kn resistor connected in series? (b)…

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Q: An electric heater is constructed by applying a potential difference of V=50.52V to an element wire…

A: Given: The potential difference is 50.52 V. The resistance of the circuit is 19.03 Ohm.

Q: Unreasonable Results(a) What current is needed to transmit 1.00 X 102 MW of power at 10.0 kV? (b)…

A: Given Data: The power is, P=1.00×102 MW The voltage is, V=10.0 kV The length of a wire is, L=1.00 km…

Q: For the circuit shown in Fig. both volt meter and ammeter are idealized, the battery has no…

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Q: A 120 V potential difference is applied to a space heater whose resistance is 17 Q when hot. (a) At…

A: Given that:- E=120 VR=17 ΩP=?   Since, P=E2RP=120217P=847.06 W   (a)Hence, electrical energy is…

Q: The resistance of a carbon resistor at 20°C is 18 Ω. What would be the resistance at 120o C? (The…

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Q: Calculate the resistance of an annealed copper wire of 710 m long and a diameter of 128 mils at 20 0…

A: The given length of the copper wire l = 710 m and the diameter of the wire is d = 128 mm  at 20oC…

Q: A flashlight uses batteries that add up to 4.5 V and has a power output of 0.63 W. (a) How much…

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Q: A coffee maker is rated at 1.14 kW when connected to a 120 V source. (a) What current (in A) does…

A: POWER = P = 1.14 X103= 1140 W voltage = V = 120 V Current = i = ?

Q: toaster operating on 120 V uses a current of 9.4 A. (a) What is the toaster's power consumption? |w…

A: a) We know that power consumed by any resistor is  P=VI=120V(9.4A)=1128W b)Energy used by it…

Q: An electric skillet is rated at 0.61 kW when connected to a 120 V source. (a) What current (in A)…

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