Two fixed type resistors, 4 ohms and 7.5 ohms, are connected in parallel. + 12 volts 4 2 7.50 If a 12 volt battery is supplied to the parallel connection, how much power is consumed by the 7.5 ohm resistance? Select one: a. 1.92 kW b. 19.20 Watts C. 192 kW d. 192 Watta
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- A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current of 60 A. Note that in this process the battery is being charged. (a) What is the potential difference across its terminals? (b) At what rate is thermal energy being dissipated in the battery? (c) At what rate is electric energy being converted to chemical energy? (d) What are the answers to (a) and (b) when the battery is used to supply 60 A to the starter motor?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?consider a portable electric blanket that runs on a 4,5 V battery. ıf you use copper wire with a 0,75 mm diameteras the heating element, how long should the wire be (in units of meters) if you want to generate 20 W of heating power ?(take the resistivity of the copper wire as p = 1,7 * 10-8 ohm*m)
- 4. Take emf force of power supply is V=12V and R1=R2= 7 Ω, R3=R4=R5= 70 Ω and R6=70/5 Ω?a. Find equivalent resistance? b. Find the voltage difference of R5 resistor? c. Find the current through R6 resistor?7. I have a 15 Watt phone charger that delivers 5 Volts to my phone . What is the current thatit produces?A. 75 W B. 3 W C. 75 A D. 3 AA 300 ohms resistor and a 570 ohms resistor are in series. When this combination is connected across a 12- Volt battery, how do you determine the current is in mA?
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- 19 q6 In order to triple its resistance, by how much would you have to increase the temperature of a piece of the following? (a) copper (The temperature coefficient of resistance for copper is 3.9 10-3 (°C)-1.) °C(b) Nichrome (The temperature coefficient of resistance for Nichrome is 4.0 10-4 (°C)-1.) °CWhat is the output voltage of a 3.00-V lithium cell in a digital wristwatch that draws 0.660 mA, if the cell's internal resistance is 2.15 Ω? (Enter your answer to at least five significant figures.)VA 14[Ω] resistor is connected to a 8.0[V] battery with internal resistance of 2.0[Ω]. What is the power delivered by the emf source?