A 224-Ω resistor and a 589-Ω resistor are connected in series across a 90.0-V line, (a) What is the voltage across each resistor? (b) A voltmeter connected across the 224-Ω resistor reads 23.8 V. Find the voltmeter resistance, (c) Find the reading of the same voltmeter if it is connected across the 589-Ω resistor, (d) The readings on this voltmeter are lower than the “true” voltages (that is. without the voltmeter present). Would it be possible to design a voltmeter that gave readings higher than the “true” voltages? Explain.
A 224-Ω resistor and a 589-Ω resistor are connected in series across a 90.0-V line, (a) What is the voltage across each resistor? (b) A voltmeter connected across the 224-Ω resistor reads 23.8 V. Find the voltmeter resistance, (c) Find the reading of the same voltmeter if it is connected across the 589-Ω resistor, (d) The readings on this voltmeter are lower than the “true” voltages (that is. without the voltmeter present). Would it be possible to design a voltmeter that gave readings higher than the “true” voltages? Explain.
A 224-Ω resistor and a 589-Ω resistor are connected in series across a 90.0-V line, (a) What is the voltage across each resistor? (b) A voltmeter connected across the 224-Ω resistor reads 23.8 V. Find the voltmeter resistance, (c) Find the reading of the same voltmeter if it is connected across the 589-Ω resistor, (d) The readings on this voltmeter are lower than the “true” voltages (that is. without the voltmeter present). Would it be possible to design a voltmeter that gave readings higher than the “true” voltages? Explain.
three light bulbs with an internal resistance of 1ohm each are wired first in series and then in parallel. each time they are connected to a 12v battery. which of teh following statement is true
a. the equivalent resistance of the circuit will be greater when they are wired in parallel.
b. the current through each light bulb will be greater when they are wired in parallel
c. the voltage drop across each resistor will be greater when they are wired in series
d. the light bulb will burn brighter when they are wired in series
What is the smallest capacitor needed in a computer power supply in order to supply at least 0.1 A of current for 0.13 s after the power goes off? Assume that the resistance of all the components of the computer mother board is 5 Ω and it uses a 5 V supply.
Gloria, a lab technician for an electronics company sets up the circuit shown in the figure. The reading of the voltmeter is 5.20 V and the reading of the ammeter is 3.10 mA. Assuming the voltmeter and ammeter are both ideal, calculate the following.(a)the value of R (in kΩ) (b)the emf (in V) of the battery (c)the voltage (in V) across the 3.00 kΩ resistor V
Chapter 26 Solutions
University Physics, Volume 2 - Technology Update Custom Edition for Texas A&M - College Station, 2/e
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