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- A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg • °C, assuming no heat escapes?
- Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.24.1% Resources Lx Give Up? Hint The Iceberg Kid, infamous for imposing a deep freeze on whoever disagrees with him, discovers that in his advanced teenaged years his hands constantly feel chilled. As he is a cool physics student, the Iceberg Kid quickly calculates the resistance of the resistor needed to warm his hands. Given that 177 J of thermal energy is generated by the resistor during 7.69 s of operation while connected to a 12.0 V battery, find the correct value of this resistance (and avoid a cold, cold fate). resistance: Ω= 250 [12]. Andami namang resistors! Consider the resistor network shown in the figure, with R₁ R₂ = 1.0 [kN], R3 = 1.2 [kN], R4 = 1.0 [kN], and R5 = 1.5 [k]. The source voltage & is 24 [V], and has no internal resistance. What is the current passing through R₁? E R₁ www www R₂ O A. 34 [mA] O B. 54 [mA] O C. 96 [mA] O D. 104 [mA] www R3 R4 R5
- A 1500 W cooling device must operate at a voltage of 120 V. a) What is the current flowing in this device? b) How resistant is the device? c) How much energy in kilojoules does the device produce in one 0.5 hour?1. At what rate is thermal energy being generated in the 2R-resistor when &= 21 V and R 3.0 o? R. 2R R Select one: a. 13.5 W b. 18.4 W C. 1.5 W d. 6 W e. 24 W OO Shot by Hisense H12Integrated Concepts. A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. At what rate (in oC/min ) will its temperature increase if its mass is20.0 kg and it has a specific heat of 0.300 kcal/kg. oC, assuming no heat escapes?
- 7. A 22-KQ resistor having a tolerance of 10% has failed. You have on hand five resistors, valued at 120, 220, 47, 33 and 120KO, respectively. What combination of these would you choose to connect in parallel to replace the failed component? Give your answer by sketching the circuit diagram of the resultant.4. Consider the power dissipated by a resistor, P=I'R . Suppose we have a current of 1 amp and a resistance of 100 Ohms, and these values are exact. The power is then 100 Watts exactly. a. Suppose the current changes by +0.02 A and the resistance changes by -1 Ohm. These are changes in the current and resistance. Use partial derivatives to find the approximate change in the power and check this result by directly substituting the changed current and resistance. b. Now suppose the current has a tolerance of +/- 0.02 A and the resistance a tolerance of +/- 1 Ohm. Find the tolerance in the power dissipated.12:38 a Imssb1.mutah.edu.jo/mod/c 15 Not yet answered Marked out of 10.00 P Flag question What is the resistance (in units of 0) of a wire made of a material with a resistivity of 3.2 × 10-8 Q . m, if its length is 46.5 m and its diameter is 0.50 mm? Select one: A. 16.88 B. 7.58 C. 2.93 D. 1.89 E. 26.18 Previous page Next page Quiz navigation 1 3 4 6 7 8 9 10 +