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- A typical cell phone consumes an average of about 1.00 W of electrical power and operates on 3.80 V. (a) What average current does the phone draw from its battery? (b) Calculate the energy stored in a fully charged battery if the phone requires charging after 5.00 hours of use.18KJ for 5 ts minut affliane usis voltige g 200 V liance an enegy Gi curlnt 200V. Fud flaney at teay the196v + Vi www R₁ 126 Vn www Using node voltage to find : 1- Vn 2-11 3-12 www R3 2 R₂ 252 V2 134v
- H 3a 6v R tami V ܝܐ 412 www. 5a 8 www 12V FIND: V, I, & RIn PH211 lab, we will use a battery to complete the following circuits. When the battery is connected and then disconnected, which circuit still can store electric charges? ed 1.00 ion R ww wv R R R Figure I Figure II Figure II R R R Figure IV Figure V Select one: O a. Figure II O b. Figure II Oc. Figure I O d. Figure IV Oe. Figure V 12:22 PM 5/13/2021IN 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…
- Construct Your Own Problem. Consider a battery used to supply energy to a cellular phone. Construct a problem in which you determine the energy that must be supplied by the battery, and then calculate the amount of charge it must be able to move in order to supply this energy. Among the things to be considered are the energy needs and battery voltage. You may need to look ahead to interpret manufacturer’s battery ratings in ampere-hours as energy in joules.Suppose a flashlight has 6.8 × 102 C of charge pass through it during time 0.35 h. A. What is the rate of the flashlight’s energy consumption, in watts, if it operates at a voltage of 3.00 V?Find the currents of Is and Is and the voltage of V7. R-4k2 R=12kN ww + R-8ka3 R=24kNg 72v" R;=24k2g V7, FR,-9ka7 R=3k2 R3=12k2 R=12k2 R-6k2
- Calculate the rate of the flashlight’s energy consumption. Suppose a flashlight has 6.8 × 102 C of charge pass through it during time 0.35 h. A. What is the rate of the flashlight’s energy consumption, in watts, if it operates at a voltage of 3.00 V?If E = 100 V, what is the voltage (in V) across R4?Te-Learning Portal Courses - Reports e-Services ▼ Academic Departments - ETC - CIMS Salim During an experiment to verify Ohm's law, the voltage supplied and the current through a circuit are measured. [Voltage is measured in Volt (V) and current in Ampere (A)]. ww R on Battery The measured value of the current is I = 3.1 ± 0.2 A and that of the voltage is V = 14 0.5 V. The resistance of the circuit (in N) can be calculated using the formula, R = V/I, Calculate the, a) Resistance (in 2) = b) Fractional uncertainty in the resistance = c) Absolute uncertainty (in 2) in the resistance=