When a resistor with resistance R is connected to a 1.50-V flashlight battery, the resistor consumes 0.0625 W of electrical power. (Throughout, assume that each battery has negligible internal resistance.) (a) What power does the resistor consume if it is connected to a 12.6-V car battery? Assume that R remains constant when the power consumption changes, (b) The resistor is connected to a battery and consumes 5.00 W. What is the voltage of this battery?
When a resistor with resistance R is connected to a 1.50-V flashlight battery, the resistor consumes 0.0625 W of electrical power. (Throughout, assume that each battery has negligible internal resistance.) (a) What power does the resistor consume if it is connected to a 12.6-V car battery? Assume that R remains constant when the power consumption changes, (b) The resistor is connected to a battery and consumes 5.00 W. What is the voltage of this battery?
When a resistor with resistance R is connected to a 1.50-V flashlight battery, the resistor consumes 0.0625 W of electrical power. (Throughout, assume that each battery has negligible internal resistance.) (a) What power does the resistor consume if it is connected to a 12.6-V car battery? Assume that R remains constant when the power consumption changes, (b) The resistor is connected to a battery and consumes 5.00 W. What is the voltage of this battery?
When a resistor with resistance R is connected to a 1.50 V flashlight battery, the resistor consumes 0.0625 W of electrical power. (Throughout, assume that each battery has negligible internal resistance.) (a) What power does the resistor consume if it is connected to a 12.6 V car battery? Assume that R remains constant when the power consumption changes. (b) The resistor is connected to a battery and consumes 5.00 W. What is the voltage of this battery?
ou bought a 28.0 V battery, 20.0 Ω, 64.0 Ω, and 103.0 Ω resistors. You decide to connect them in parallel and wish to calculate the current (in A) through each resistor and power(in W) dissipated by each resistor.
(a)
Calculate the equivalent resistance in the parallel circuit.
Reqv = Ω
(b)
Calculate the currents (in A) and the power (in W)for each resistor.
I20.0 Ω = A
P20.0 Ω = W
I64.0 Ω = A
P64.0 Ω = W
I103.0 Ω = A
P103.0 Ω = W
A circuit consists of two 100-kΩ resistors in series with an ideal 12.0-V battery.
(a) Calculate the potential drop across one of the resistors.
(b) A voltmeter with internal resistance 10.0 MΩ is connected in parallel with one of the two resistors to measure the potential drop across the resistor. By what percentage will the voltmeter reading deviate from the value you determined in part (a)? (Hint: The difference is rather small, so it is helpful to solve algebraically first to avoid a rounding error.)
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