A power of 200 kW is delivered by power lines with 48,000 V difference between them. Calculate the current, in amps, in these lines. --If the lines in problem above, have a resistance of 100-Ω, calculate the change of voltage along each line.

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Q: An automobile starter motor has an equivalent resistance of 0.0500Ω and is supplied by a 12.0-V…

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A: Answer:  bi,e 2A

Q: Calculates the power dissipated in each of the following cases for an electrical device operating at…

A: Given data: Voltage (V) = 220 V Current (I) = 15 A Required: Power (P)

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A:

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Q: Give examples where heating effect of circuits is not useful

A: heating effect

Q: A 3.0 Ohm wire is 4.3 meters long. If the wire is cut in half, the resistance will be...?Explain.

A:

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A: Given : τ = 3.12 seconds I = 420 mA = 0.420 A V = 12 V

Q: In the circuit in the figure, a potential difference V is applied as shown. Determine the value of…

A: Calculate the equivalent resistance. Req=RRA+2R+RRA+2R=RA+R2RRA+2R+2R=2RRA+2R2RA+4R   Hence, the…

Q: If one branch of a 120-V power line is protected by a fuse of 20-A. Will the fuse carry 10-Ohm load?

A: Power line = 120 volts fuse rating = 20 A It means that the maximum current that can flow through…

Q: refer to this problem: Consider a battery with an emf of 25.0 V and an internal resistance of 0.233…

A:

Q: What quantity will be twice as its original value when you doubled the voltage in a simple electric…

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Q: Given the circuit shown here, determine the terminal voltage of the battery.

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Q: a iz 120 is is 12V the qV

A:

Q: after the opera, uber-geek goes home to play work on his robot girlfriend (she's a great listener…

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Q: calculates the intensity and the voltage drop for each resistance

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Q: A light bulb marked "60 W [at] 120 V" is screwed into a socket at one end of a long extension cord…

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Q: Why is it important to determine the rate of growth and decay of current in circuits?

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Q: Current causes the temperature of a real resistor to increase. Why? What effect does this heating…

A: Current causes the temperature of a real resistor to increase because:

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Q: All household circuits are wired in parallel. A 1250-W toaster, a 320-W blender, and a 75-W lamp are…

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Q: Vrms is always equal to maximum voltage (Vo) Select one: OTrue OFalse

A: It is question related to Vr.m.s and Vo .

Q: 11. If It = 8 amperes in the circuit in Fig 5-14, find Eg and 13. a. Eg b. 13 12. For the circuit in…

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Q: What change occur in the line current when more devices are introduced in a serial circuit?

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Q: During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. The…

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Q: A small bulb has a resistance of 2 ohm when it is cold. It draws 0.4 ampere current from a source…

A: Given, Resistance (R cold) = 2 Ohm Current (I) = 0.4 Ampere Voltage (V) = 4V

Q: The term "electrical load capacity" refers to the total amount of power provided by the main service…

A: The total amount of electrical service capacity is measured in amperages (amps). In older homes with…

Q: An 1800-W toaster, a 1400-W electric frying pan, and a 75-W lamp are plugged into the same outlet in…

A: The power of the device is, P=VII=PV The current drawn by the toaster is, I1=P1V=1800 W120 V=15 A

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.