Fuses or circuit breakers set safety limits (maximum current) either on the appliance or on the particular household power line providing electricity. They protect people from electrocution, houses from fires, and appliances from damage. Circuit breakers detect current and open up their circuit "switches" to stop
The table below lists typical electricity (power, current) used by common household appliances. Which appliance draws the highest current?
Which appliance draws the second highest current? What appliance has the same power wattage as the toaster? Houses typically use 15A and 20A rated circuit breakers. Assume 20A circuit breakers. Someone plugs in a hairdryer and iron into the same bathroom power outlet. Will the circuit breaker open when both are running at the same time? Could a vacuum cleaner run on the same power outlet that a computer is using without the circuit breaker opening?
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- Consider the circuit below. The battery has emf 80.0 V, R1=40 ohms, R2= 20 ohms and L= 5.0 mH. Initially the switch is open and no currents are flowing. What is the current through the battery immediately after the switch is closed? a) zero b) 1.3 A c) 2.0 Aarrow_forwardPart A) Too much current can be a bad thing. When too much current flows through a wire, the wire heats up and either melts or causes a fire. Turning on too many appliances at the same time can cause a large amount of current to flow through the wiring in your home. Since this can be a dangerous thing, most homes are protected by a circuit breaker. A circuit breaker monitors the amount of current and shuts it down if the current becomes larger than a specified value. Suppose the circuit in your kitchen is protected by a circuit breaker that shuts off the current when it reaches 10 amperes. A new toaster oven that you have just purchased has a resistance of 8 ohms. When you plug the toaster into the 120-volt electric outlet, does the circuit breaker shut off? yes / no. Why or why not? Part B) What is the power rating of the toaster? In other words, how much power does the toaster normally consume? Show your work below:arrow_forward15 A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 42.7-μF capacitor is charged to 5.90 kV. Paddles are used to make an electric connection to the patient’s chest. A pulse of current lasting 1.00 ms partially discharges the capacitor through the patient. The electrical resistance of the patient (from paddle to paddle) is 240 Ω. How much energy is dissipated in the patient during the 1.00 ms? _____Jarrow_forward
- Using Kirchhoff's Laws calculate each of the unknown currents in the circuit.arrow_forward19 q10 Car batteries are often rated in amp-hours. This rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. The amp-hour unit is convenient for simple calculations. For example, a 60-amp-hour battery can supply a current of 1.0 A for 60 h (or 60 A for 1.0 h) before going dead. Find the energy stored in the following. (a) a 56 A-h, 14 V car battery(b) a 1.1 A-h, 1.7 V flashlight batteryarrow_forwardA student calculates the total potential difference of a circuit given the total current and total resistance for the circuit. The student works a new version of the question where the power has been changed by a factor of 0.693. Determine the factor by which the answer would change. 0.693 It does not change or it does not make sense to calculate given this information. 0.480 1.443arrow_forward
- Q55. The following circuit is given, and you are asked to determine the current flowing through each resistor and its direction. 12.0 V 12.0 V 6.000 4.000 6.000arrow_forwardWhen using an ammeter to measure current: Group of answer choices open the circuit at the positive and negative terminals of the battery. open the circuit and connect the meter in series between the two open ends. open the circuit at one point and connect the meter to one end. connect the meter across the battery or load.arrow_forward*Chapter 32, Problem 018 GO Your answer is partially correct. Try again. The circuit in the figure consists of switch S, a 4.60 V ideal battery, a 25.0 MS2 resistor, and an airfilled capacitor. The capacitor has parallel circular plates of radius 5.30 cm, separated by 4.00 mm. At time t = 0, switch S is closed to begin charging the capacitor. The electric field between the plates is uniform. At t = 260 ps, what is the magnitude of the magnetic fleld within the capacitor, at radial distance 2.50 cm? R Number [0.000000000000029578 Units harrow_forward
- *Chapter 32, Problem 018 GO Your answer is partially correct. Try again. The circuit in the figure consists of switch S, a 4.60 V ideal battery, a 25.0 MN resistor, and an airfilled capacitor. The capacitor has parallel circular plates of radius 5.30 cm, separated by 4.00 mm. At time t = 0, switch S is closed to begin charging the capacitor. The electric field between the plates is uniform. At t = 260 us, what is the magnitude of the magnetic field within the capacitor, at radial distance 2.50 cm? R Units Number [0.000000000000384arrow_forward2. The capacitor in the figure below is initially uncharged and the switch, in position c, is not connected to either side of the circuit. The switch is now flipped to position a for 10 ms, then to position b for 10 ms, and then brought back to position c. What is the final potential difference across the capacitor? 12 V 150 Ω ww a b 40 μF 150 Ωarrow_forward1002 V100 202 ww ww R1002 R200 V20 R50 50 1100 I20 V5 V2 = 4 volts V = 9 voltsarrow_forward
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