G Look at the electric circuit. + O F Key Which option is correct? O A. The bulb is lit. B. The circuit is closed. C. The bulb is not lit. D. The switch is closed. Wire Battery Bulb Open switch Closed switch (W)
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- (Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . A power supply is connected to two bare wires that are inserted into a glass of saltwater. The resistance of the water decreases as the voltage is increased. Sketch a graph of the voltage versus the current in the water showing this type of behavior.(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Make a sketch of an electric circuit that contains a switch and two lightbulbs connected in such a way that if either bulb burns out the other still functions, but if the switch is turned off, both bulbs go out.(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Six resistors, all having the same temperatures and compositions, are each attached to a battery with voltage V to form a simple circuit. The resistors have different lengths, l, but the same diameters. Rank the circuits according to the current that flows through the resistor from smallest to greatest. If two (or more) circuits have the same current flowing, give them the same ranking. Explain the rationale you used to establish your rankings. Circuit 1: l = 2 cm; V = 3 V Circuit 2: l = 2 cm; V = 6 V Circuit 3: l = 1 cm; V = 3 V Circuit 4: l = 1 cm; V = 6 V Circuit 5: l = 3cm; V = 2 V Circuit 6: l = 3cm; V = 6 V
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- 1. What happened to the voltage across the resistance box as the current through it was increased? What is the relationship between voltage and current when resistance is fixed? 2.What is the current in a 10 ohms resistor due to a potential difference of 40 V? Explain.Eight holiday lights are connected in series as shown inFig. 5.83.a. If the set is connected to a 120-V source, what is thecurrent through the bulbs if each bulb has an internalresistance of 2818 ?b. Determine the power delivered to each bulb.c. Calculate the voltage drop across each bulb.d. If one bulb burns out (that is, the filament opens),what is the effect on the remaining bulbs?Q2- According to the picture, by showing all your calculations clearly, find(a) all the currents I1, I2 and I3 shown,(b) the power given by ε1 and ε2 ,(c) the power dissipated in resistors in Figure.
- Manufacturing electrical resistors Ohm’s law for electricalcircuits like the one shown in the accompanying figure states thatV = RI. In this equation, V is a constant voltage, I is the currentin amperes, and R is the resistance in ohms. Your firm has beenasked to supply the resistors for a circuit in which V will be 120volts and I is to be 5 { 0.1 amp. In what interval does R have tolie for I to be within 0.1 amp of the value I0 = 5?For the circuit shown in Figure P2.24, determinewhich components are supplying power and which aredissipating power. Also determine the amount ofpower dissipated and supplied.The picture shows my (in)expert rendition of an analog needle voltmeter. The low-voltage wire is plugged into the black (GND) plug, while the high-voltage wire is plugged into one of the red plug. Enter the voltmeter reading if the high-voltage wire is plugged into the 15-volt plug.