The current through the 30 Ω resistor is measured to be 0.55A. What is the emf E of the battery?
A battery with an emf of 9.75 V is connected to a 67.0 Ω resistor. The current through the battery is 115 mA. What is the battery's internal resistance (in Ω)? Ω
What voltage will produce 0.35 A of current through a 4800-Ω resistor? A 9.0-V battery is connected to a bulb whose resistance is 2.2 Ω How many electrons leave the battery per minute? What is the resistance of a 7.4-m length of copper wire 1.4 mm in diameter? The resistivity of copper is 1.68×10−8Ω⋅m A 12-V battery causes a current of 0.72 A through a resistor. What is its resistance? How many joules of energy does the battery lose in...
What is the current through the battery in the following circuit if the emf of the battery is changed from 90V to 56.2 V? (Keep all other values the same). R 3.0 2 0.25 Ω Try again. You need to solve for the correct equivalent resistance and use l - emf/Req Did you round off to the correct number of significant figures?
An ideal voltmeter V is connected to a 1.5 Ω resistor and a battery with emf 4.7 V and internal resistance 0.5 Ω as shown in the figure. What is the reading on the voltmeter? (Give your answer in decimal using V as unit)
Three resistors of values 2 Ω, 6 Ω and 12 Ω are connected across a DC voltage source as shown in Figure 21-12. If the total current through the circuit is / 3.0 A, what is the current through the 12 Ω resistor? 0.3 A 0.4 A 0.2 A 0.6 A 0.5 A
212. What is the current through each resistor and each battery? If the current is zero then state that explicitly. V1-90 V R = 222 R2-182 V3 -6.0 V
(a) Find the current in a 8.80 Ω resistor connected to a battery that has an internal resistance of 0.20 Ω if the voltage across the battery (the terminal voltage) is 8.05 V. A (b) What is the emf of the battery? V
What voltage will produce 0.25 A of current through a 4800-Ω resistor?
A 12 v battery causes a current of 0.5 A through a resistor. a) what is the resistance of the resistor? b) What is the power output of the battery? c) How many joules of energy does the battery lose in a minute? Answer each multiple choice question (part a) and then (part b) explain in words why your answer is correct The length of a wire is doubled and the radius is doubled. By what factor does the resistance...
b) What current flows through R6 in mA? In the following circuit, the battery emf is 25V, R1 = 3 kN, R2 = 5 kN, R3 = 1.5 kN, R4 = 8 kN, R5 = 1 kN, Ro = 2 k12, -R2 R4 .Ro w R1 R3 RE What current is drawn from the battery in mA?