College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Current describes the rate of electricity (how fast charges are moving). Its formula is I=q/t. The higher the current, the more charges are flowing per unit time. When charging smartphones using a standard USB port, only between 0.5 to 1.5 amps of current can be delivered. Dedicated chargers or superchargers can deliver higher currents, around 2.0 amps or more. Using a supercharger that can deliver 2.0 amps, how much charge is delivered in 1 hour to a smartphone? Select: (7200C, 1800C, 3600C, or 120C) How many electrons is this? Select: (about 4.5E22 electrons, about 1.1E22 electrons, about 2.2E22 electrons, or about 9.9E22 electrons) If the supercharger has a voltage of 5V, what is the equivalent resistance of the smartphone? Select: (5 ohm, 10 ohm, 2.5 ohm, or 0.25 ohm) How much power (in Joules) was dissipated by the supercharger? Select: (5 Watts, 10 Watts, 20 Watts, or 25 Watts) What is this power in horsepower? Select: (0.0134 hp, 0.0537 hp, 0.0268 hp, or 0.0067 hp) How much energy was gained by the smartphone at the end of the 1 hour of charging? Select: (10 J, 600 J, 2500 J, 36,000 J) https://www.rd.com/article/charge-smartphone-laptop-battery-last-longer/
![Current describes the rate of electricity (how fast charges are moving). Its formula is I = . The higher the current, the more charges are flowing per unit time. When charging
smartphones using a standard USB port, only between 0.5 to 1.5 amps of current can be delivered. Dedicated chargers or superchargers can deliver higher currents, around 2.0 amps or
more.
Using a supercharger that can deliver 2.0 amps, how much charge is delivered in 1 hour to a smartphone? [Select]
How many electrons is this?
[Select]
If the supercharger has a voltage of 5V, what is the equivalent resistance of the smartphone? [Select]
How much power (in Joules) was dissipated by the supercharger? [Select]
What is this power in horsepower? [Select]
How much energy was gained by the smartphone at the end of the 1 hour of charging?
https://wwww.rd.com/article/charge-smartphone-laptop-battery-last-longer/
[Select]](https://content.bartleby.com/qna-images/question/687b9114-a43a-4cb5-853d-f00588ff9568/878a91b1-843e-4b45-a4db-d7ff9752ef8d/qn3aa7p_processed.png)
Transcribed Image Text:Current describes the rate of electricity (how fast charges are moving). Its formula is I = . The higher the current, the more charges are flowing per unit time. When charging
smartphones using a standard USB port, only between 0.5 to 1.5 amps of current can be delivered. Dedicated chargers or superchargers can deliver higher currents, around 2.0 amps or
more.
Using a supercharger that can deliver 2.0 amps, how much charge is delivered in 1 hour to a smartphone? [Select]
How many electrons is this?
[Select]
If the supercharger has a voltage of 5V, what is the equivalent resistance of the smartphone? [Select]
How much power (in Joules) was dissipated by the supercharger? [Select]
What is this power in horsepower? [Select]
How much energy was gained by the smartphone at the end of the 1 hour of charging?
https://wwww.rd.com/article/charge-smartphone-laptop-battery-last-longer/
[Select]
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- Three identical 100.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in in the figure below. Assume that the resistance of each bulb is constant (even though in reality the resistance increases markedly with current). 120 V R₁ R₂ (a) Find the total power supplied by the power source. W = (b) Find the potential difference across each lightbulb. AV₁ AV₂ = AV₂ = Need Help? Read It R₂ V Master Itarrow_forwardI_2 is the current travelling through the 2 Ohm resistor. I_4 is the current travelling through the 4 Ohm resistor I_5 is the current travelling through the 5 Ohm resistor A. What is the magnitude of I_2? B. What is the magnitude of I_4? C. What is the magnitude of I_5?arrow_forwardIn the circuit shown, the potential difference V₁ = VB = 41.0 V and the resistance R₁ = R₂ = R3 = R4 = 215 2. The arrows for currents IA and Iß indicate the direction of positive current flow. The arrows do not necessarily indicate the direction of the actual current flow at those points. Determine the current IA. IA = Determine the current IB. IB = A A RA www R₁ ww R₁ www R₁₁ wwwarrow_forward
- The brightness of a lightbulb is dependent on the current that goes through the lightbulb (in reality on the power, which is I^2/R). In Europe, the voltage used is 220 Volts, as opposed to the 120 Volts used in the USA. Will a lighbulb that is made for European voltage work well or poorly in the USA? It will work poorly in the USA. Since I=V/R, if V decreases, so does I, and so does the brightness. It will work more efficiently in the USA. Since I=V/R, if V decreases, I increases, and the brightness increases. It will work better in the USA because the resistance of the wires is smaller. Whether it works better or worse depends on how modern the wiring system is, regardless of the voltage, V.arrow_forward4. A 12.0 V battery is connected to the resistor combination shown below. (a) How much current leaves the battery due to the resistors? (b) What is the current through each resistor? a 12 Q2 W R₁ R3 R₁ 692 w 692 692 www R₂ R₁ www 6Ω barrow_forwardCalculate the hours a 25.0 Watt light bulb will burn when powered by a 13.0 g lead storage battery at a constant voltage of 1.5V. 1 Watt = 1 J/s. Pb(s) →Pb+2(aq) + 2e-1 Group of answer choices 0.0504 hours 0.202 hours 0.101 hours 9.91 hours 4.96 hours 27.1 hoursarrow_forward
- What is the total current (in A) passing through the circuit if V = 12 V, R1 = 40 Q, R2 = 20 Q, and R3 = 40 0? Give your answer as only the numerical value in the SI units specified. e is interpreted as x10^ for use with large or small values; 1.01e2 is interpreted as 1.01 x 104. R2 R1 R3arrow_forwardLightning is a spectacular example of electric current in a natural phenomenon. There is much variability to lightning bolts, but a typical event can transfer 10^9 J of energy across a potential difference of perhaps 5 x 10^7 V during a time interval of about 0.2 s. Use this information to estimate (a) the total amount of charge transferred between cloud and ground (b) the current in the lightning bolt (c) the average power delivered over the 0.2 s.arrow_forward
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