A 5.0 2 resistor is connected in series with another resistor and a 4.5 V battery. The current in the circuit is 0.50 A. Calculate the value of the unknown resis- tance. Answer in units of 2.
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- A circuit with a resistance R = 88 Ω is connected to a battery with potential difference across the terminals of ΔV = 6.5 V. a. Input an expression for the current passing through the circuit, I. (b) What is the current in milliamps, mA? (c) If the resistance of the circuit was increased by a factor of ten, Rnew = 10R, what is the new current in milliamps, mA?An ideal battery has an emf of 14.3 V. If it is connected to a circuit and creates a current of 2.18A, what is the power delivered by the battery in units of Watts?The circuit shown in the figure below is connected for 3.30 min. (Assume R, = 8.80 2, R2 = 1.80 N, and V = 15.0 V.) 5.00 N 3.00 R2 1.00 N R -4.00 V V -T (a) Determine the current in each branch of the circuit. branch magnitude (A) direction 7.66 Your response differs from the correct answer by more than 100%. left branch down middle branch down right branch up (b) Find the energy delivered by each battery. 3397.68 4.00 V battery If you know the current through a battery, how do you determine the power delivered by the battery? J 15.0 V battery kJ
- When two identical resistors are connected in series to a 100 V voltage source, the current is measured to be 7 mA. Now suppose the resistors are connected to the voltage in parallel. Find the power supplied by the source. (in W) OA: 2.800 B: 4.060OC: 5.887 OD: 8.536 OE: 1.238×10¹ OF: 1.795×10¹ OG: 2.602×10¹ OH: 3.773x10¹5.00 120 V 6.00 3110 4.00 8.00 1 2 A. The total currenț through the circuit is B. The voltage across the 8 Ohms resistor is V. C. The power is dissipated in the 5 Ohms resistor is W. Input all answers as whole numbers. A.The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage. The radio has a 3.2 0 resistance. Hint a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if a single nicad cell is used? The voltage supplied to the radio is b. With an alkaline cell, having an internal resistance of 0.2 , what is the voltage supplied to the radio, if a single alkaline cell is used? The voltage supplied to the radio is The radio's effective resistance is lowered when its volume is turned up. At what value of radio's resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell? Hint for (c) When the radio has an effective resistance of voltage can be obtained with a nicad cell. V. V. 2 or smaller, a greater
- Problem 5: A current of I- 2.6 A passes through the circuit shown, where R- 65 3R 5R V) 2R 6R 2R 7R 5R 10R Otheexpertta.com Part (a) In terms of R, I, and numeric values, write an expression for the voltage of the · source, V. Part (b) What is the voltage, V in volts? tan( sin() cotanO a acos cosh0t cosO asin() acotan 4 5 6 sinh() cotanhO *1 23 0 tanh0c O Degrees O Radians CLEAR BACKSPACETwo resistors are connected in series with an 15.19 volt battery. The resistors have values of R1 = 1.41 ohms and R2 = 6.28 ohms. What is the current (in amps) in this circuit? Round your answer to two decimal places.Two resistors are connected in series in a circuit with a battery. The electromotive force (emf) of the battery is 3.0 volts. The resistances are 0.40 ohms and 1.85 ohms. (a) Determine the current I. Hint: The same current flows through both resistors. The voltage drop across the two resistors, i.e. IR₁ ✈ IR₂, is equal to the emf. (d) Determine the power in the first resistor. 1.78 W (e) Determine the power in the second resistor. 2.49 W