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If the current in the 100 Ω resistor is 0.12 A, what is Eℰ ?
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- (a) What is the unknown emfx in a potentiometer that balances when Rxis 10.0 O, and balances when Rsis 15.0for a standard 3.000-V emf? (b) The same emfx is placed in the same potentiometer, which now balances when Rsis 15.0for a standard emf of 3.100 V. At what resistance Rxwill the potentiometer balance?A capacitor charging circuit consists of a battery, an uncharged 20 μF capacitor, and a 5.6 kΩkΩ resistor. At t = 0 ss the switch is closed; 0.15 s later, the current is 0.46 mA . What is the battery's emf?How much current is required to transmit 1500 W down an overhead cable at a voltage of 3.0 x 10⁵ V? a. 2.0 x 10⁰ A b. 2.0 x 10² A c. 4.5 x 10⁸ A d. 5.0 x 10⁻³ A e. 5.0 x 10³ A
- Emf1=25V R1= 2 ohm R2= 1ohm R3= 4 ohm I= 0.83A What is the magnitude of the Emf2?(absolute value)Compute for the total energy of the entire circuit. Select one: a. 128.42 micro Joules b. 352.12 micro Joules c. 273.56 micro Joules d. 478.08 micro JoulesHow much voltage does a light bulb receive if 5.00 C delivers a total of 250 J of energy? a. 1250 J b. 1250 V c. 50.0 J d. 50.0 V
- A power supply with a DC voltage of 5.0 V discharges 500.0 J of energy through a 25 Ohm resistor. How much total electric charge must flow between the battery's terminals to discharge this much energy? a. 0.05 C b. 0.01 C c. 100 C d. 0.2 C e. 2500 CDetermine the safe current and safe voltage of the following resistors: 200 Ω / 0.25W 20k Ω / 0.5W 4k Ω / 0.5W 720 Ω / 0.25W 822k Ω / 2WFind the emf of the cell described by the cell diagramFe | Fe2+ (1.500M) || Au3+ (0.00400M) | Au. Group of answer choices 1.94 V 1.66 V 1.99 V 1.91 V 1.89 V
- A light bulb has a resistance of 95 Ω when operating at 120 V. How much energy is given off by the light bulb after 1 day? 1.48 x 10^7 J 4.64 x 10^7 J 8.90 x 10^7 J 1.31 x 10^7 J 9.19 x 10^7 JA bird stands on a DC electric transmission line carrying 4100A that has a cross-sectional radius of 1mm. The line has 2.5 x 10-5 Ω resistance per meter, and the bird’s feet are 4.0cm apart. What is the potential difference between the bird’s feet? 0.008 joules 130.507 joules 1305.07 volts 0.08 volts5. The battery voltage is V = 86.5 V; and the resistances are R1 = 195 Ohms; R2 = 137 Ohms; R3 = 183 Ohms; R4 = 153 Ohms; R5 = 119 Ohms; and R6 = 118 Ohms. How much power flows through resistor R6? 0.510 W 1.215 W 0.729 W 1.458 W