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- Consider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r = 1,00 . (a) Find the equivalent resistance of the circuit and the current out of the battery. (b) Find the current through each resistor, (c) Find die potential drop across each resistor, (d) Find the power dissipated by each resistor, (e) Find the total power supplied by the batteries.An electric razor has a resistance of 18 Ω and a c urrent o f 0.28 A . Calculate t h e potential drop acrossthe razor.A 1.5 Volt (V) Battery is charged completely. If this battery attached tothe terminals an of small incandescent light bulb with resistance R = 4.5Ohms, calculate the magnitude of the current flowing through the bulb inAmps.
- ) An electron beam consist of 1016 electrons passing through a given cross section n one minute. (a) Determine the current in amperes. (b) If the potential difference between the tip of the electron gun and the screen is 5000 V, determine the resistance of the path taken by the electron beam.How much electrical energy is transferred to thermal energy in 2.50 hrs by an electrical | resistance of 500 ohms when the potential applied across it is 80.0V?(1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire?
- Unreasonable ResultsTwo resistors, one having a resistance of 145 Ω , are connected in parallel to produce a total resistance of 150 Ω. What is the value of the second resistance?Over the course of an 8 hour day, 3.8x104 C of charge | A 0.50-W, 220- 2 resistor carries the maximum current pass through a typical computer (presuming it is in use possible without damaging the resistor. If the current the entire time). Determine the current for such a were reduced to half the value, what would be the computer. power consumed? Three resistors are connected in series with a voltage Source of 48. V. A 100Q, a 2.50-kSQ, and a 4.00-kQ resistor what is the current on 100 Q resistor?The resistance of the skin on a person's finger is typically about 10,000 N. How much voltage would be needed to cause a current of 0.001 A to flow into the finger? (This is about enough current to just be felt by most people.) Need Help? Read It Watch It MY N OTEC [-/2 Points] DETAILS OBINPHYS8 7.P.013.
- IN 77. If electric power is transmitted over long distances, the resistance of the wires becomes significant. Why? Which method of transmission would result in less they ofte wires. W F6 84. (a) energy wasted-high current and low voltage or low current and high voltage? Explain your answer. resistane V and b i potentia V is ap 78. The ideal batteries have emfs 12 V and %3D 6.0 V. What are (a) the current current, the dissipation rate in (b) resistor 1 (4.0 2) and (c) resistor 2 (8.0 2), and the energy transfer rate in (d) battery 1 and (e) battery 2? Is energy being supplied or absorbed by (f) battery 1 and (g) battery 2? 79. Consider 85. A series, a applied capacit 4F constar 10.0 2 25.0 V capacit the circuit shown. Find (a) 10.0 2 86. Cc the current the 20.0-2 resistor and (b) potential difference between points a and b. the 20.0 2 75 00'S 80. An automobile battery has an emf of 12.6 V and an internal resistance of 0.0800 2. The headlights together present equivalent resistance 5.00…A small city requires about 15 MW of power. Suppose thatinstead of using high-voltage lines to supply the power, thepower is delivered at 120 V. Assuming a two-wire line of0.50-cm-diameter copper wire, estimate the cost of theenergy lost to heat per hour per meter. Assume the cost ofelectricity is about 12 cents per kWhThe label on an 18 V truck battery states that it Is rated at 189 A∙h (ampere-hours). Treat the battery as ideal. Suppose the radio in the truck is left on when the engine is not running. The radio draws a current of 3.8 A. How long does it take to drain the battery if it starts out fully charged? Please submit your answer in units of hour. Round your answer to 1 decimal place.