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- What voltage will produce 0.2 AA of current through a 4800-ΩΩ resistor? Express your answer to two significant figures and include the appropriate units. V=An electric device draws 7.10 A at 240 V. If the voltage drops by 10 % , what will be the current, assuming nothing else changes? Next, if the resistance of the device were reduced by 10 %, what current would be drawn at 240 V? Express your answer to two significant figures and include the appropriate units.1. 9. In the circuit shown in the figure above, a power supplier of 50 V is connectedacross a resistance network. If R1 = 20 Ω, R2 = 10 Ω, R3 = 10 Ω, and R4 = 40 Ω. Whatis the equivalent resistor of the circuit? 2. 10. What is the current flowing through the R4 resistor in the circuit shown in Problem 9? 3. 11. What is the voltage across the R1 resistor in the circuit shown in Problem 9? 3.
- A high-voltage electricity transmission line is hung from metal towers with glass insulators having a resistance of 0.85 × 109 Ω each. What current, in milliamperes, flows through an insulator if the voltage is 180 kV?A 100 W light bulb designed to operate at 120 V has a filament with a resistance of 144 Ω. What constraints are on the design of the filament? Why cannot just any 144 Ω resistance be used as a filament for the bulb?A child’s electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 Ω in series with a 1.53-V carbon-zinc dry cell having a 0.100-Ω internal resistance. The load resistance is 10.0 Ω . (a) Draw a circuit diagram of the toy and its batteries. (b) What currentflows? (c) How much power is supplied to the load? (d) Whatis the internal resistance of the dry cell if it goes bad, resultingin only 0.500 W being supplied to the load?
- A current of I = 4.6 A passes through the circuit shown, where R = 21 Ω. a) In terms of R, I, and numeric values, write an expression for the voltage of the source, V. b) voltage?What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 15.0 V while a current of 8.00 A is charging it?A conductor has radius of 1.50 cm. How many centimeters of a material with 3.00 x 10^-2 Ω•m conductivity would be needed to yield a resistance of 4.50 ohms? A. 10.60827521 centimeters B. 10.60287521 centimeters C. 10.06287521 centimeters D. 10.62087521 centimeters
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