Your cell phone typically consumes about  410 mW of power when you text a friend. If the phone is operated using a lithium-ion battery with a voltage of 3.7 V, what is the current (in A) flowing through the cell-phone circuitry under these circumstances?

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A: From ohm's law,  Potential difference (v) = Current (I) *Resistance (R)

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Q: An automobile battery has an emf of 12.6 V and an internal resistance of 0.08 Ω. The headlights have…

A: (a) The current flows across the headlight bulbs is, ε=IR+rI=εR+r=12.6 V5.0 Ω+0.08 Ω=2.48 A (b) The…

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Q: R R 2R w W- 2R 3R R R E 2R

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Q: An electric utility company supplies a customer's house from the main power lines (120 V) with two…

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Q: An electric utility company supplies a customer's house from the main power lines (110V) with two…

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Q: Each of the six real batteries in the figure has an emf of 20.3 V and a resistance of 4.120. (a)…

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Q: During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest.…

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Q: Consider the following two circuits with identical batteries and re- sistors. A B C R R RS R If the…

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Q: A solar cell generates a potential difference of O.17 V when a 520Q resistor is connected across it,…

A: Given:R1=520Ω∆V1=0.17 VR2=940Ω∆V1=0.25 VA=2.5 cm2=2.5×10-4 m2I=5.1 mW/cm2=5.1×10-310-4=51 W/m2 Let…

Q: A 660-Ω resistor is connected to a variable-voltage power supply. (a) What voltage is necessary to…

A: Given : R = 660 Ω

Q: Consider the circuit shown below, with a battery of emf E = 20. V, and resistors R1 = 2.0 Ω, R2 =…

A: Solution:-

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A: Given value--- power = 60 W . Voltage = 100 V . We have to find--- current ?

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Q: In the circuit pictured, the resistors have values of R =170 N, R2 = 62 N, and R3 = 130 Q, and the…

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Q: A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.4 V when it is delivering…

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Q: You are given a 45.5 V battery and two resistors of resistances 25 Ω and 97.5 Ω.  Part (a)  Find the…

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Q: energy is dissipated by

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Q: A 25-W light bulb is turned on. It has an operating voltage of 120 V. (a) How much current flows…

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A: Given that,The voltage : V = 4 (V)The current : I = 4(mA) = 4×10-3 (A)Here we need to find the power…

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Q: The cord from an appliance is too short to reach the wall outlet in your room. You have two…

A: Part (a): Given: The resistance of the wire is 0.0700 Ω. The current is 5.8 A.