For a reasonably accurate reading, what must be the relationship between the internal resistance of the voltmeter and re...
For a reasonably accurate reading, what must be the relationship between the internal resistance of the voltmeter and resistor across which we're measuring the voltage drop?
Homework Answers
Add Answer to:
For a reasonably accurate reading, what must be the relationship between the internal resistance of the voltmeter and re...
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met...
Although an ideal voltmeter has an infinite
internal resistance, this theoretical ideal is usually not met in
practice. The voltmeter in the Figure has an internal resistance of
7 x 109 Ω and is used to measure the voltage across the
resistor R2 as shown. Attaching this non-ideal voltmeter
decreases the voltage across R2. Calculate the magnitude
of this decrease using an emf of 16 V and R1 =
R2 = 200 kΩ.
A voltmeter has an internal resistance of 10 000 Ω and is used to measure the...
A voltmeter has an internal resistance of 10 000 Ω and is used to measure the voltage across a 47.0-Ω resistor that, without the voltmeter connected, has a current of 1.20 A pass through it. How much current is drawn away from the circuit by the voltmeter when it is connected across the resistor? 4.7 mA 5.6 mA 1.205 A 0 A
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met...
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter in the Figure has an internal resistance of 4 x 109 2 and is used to measure the voltage across the resistor R2 as shown. Attaching this non-ideal voltmeter decreases the voltage across R2. Calculate the magnitude of this decrease using an emf of 14 V and R1 = R2 = 250 ks2. Submit Answer This question expects a numeric...
When a battery voltage is measured by placing a high-resistance voltmeter across the terminals of the...
When a battery voltage is measured by placing a high-resistance voltmeter across the terminals of the battery, the voltmeter reads 6.3V. With the voltmeter leads still attached, the battery terminals are then connected to a resistor in series with an ammeter. In this arrangement, the ammeter reads 150 mA, and the voltmeter reads 5.9V. What are the emf and the internal resistance of the battery?
What is the reading on a voltmeter when it is connected to points A and B?...
What is the reading on a voltmeter when it is connected to
points A and B?
What is the reading on a voltmeter when it is connected to
points B and C?
What is the reading on a voltmeter when it is connected to
points A and C?
What is the reading on a voltmeter when it is connected to
points A and D?
An ac voltmeter, which displays the rms voltage between the two points touched by its leads,...
Consider the two methods to measure the resistance of a resistor, as shown in the figures...
Consider the two methods to measure the resistance of a resistor, as shown in the figures below the two-point probe method and the four-point probe method. Assume that the actual resistance of the resistor is 100 Ω, the resistance of the connecting wires is 10 Ω, the internal resistance of the ammeter is 0 Ω, and the internal resistance of the voltmeter is infinitely large 1) Determine the ammeter reading (it is equal to the current from the power supply)...
Consider a circuit containing a 24 V battery and a 15 Ω resistor. We want to...
Consider a circuit containing a 24 V battery and a 15 Ω resistor. We want to mesure the current in the circuit with an ammeter of internal resistance 3 mΩ and the voltage drop across the resistor with a voltmeter having an internal resistance of 100 kΩ. a. How should be the ammeter connected (series or parallel)? b. How should be the voltmeter connected (series or parallel)? c. Draw a schematic of the circuit d. Calculate the current across the...
With the internal resistance of the battery set as close to 2 ohms as possible, which...
With the internal resistance of the battery set as close to 2 ohms as possible, which of the following voltages is closest to the voltage displayed by the voltmeter when the battery was connected to an external resistor? (Note: the voltmeter was connected across the battery).
A battery with EMF 90.0V has internal resistance R_B= 8.46. A)What is the reading V_v of...
A battery with EMF 90.0V has internal resistance R_B= 8.46. A)What is the reading V_v of a voltmeter having total resistance R_v= 490 when it is placed across the terminals of the battery? B)What is the maximum value that the ratio R_B/R_v may have if the percent error in the reading of the EMF of a battery is not to exceed 3.50% ?
8-1 12. A voltmeter with an internal resistance of 3.08 10.2 measures the voltage R, in...
8-1 12. A voltmeter with an internal resistance of 3.08 10.2 measures the voltage R, in the following figure across Ri in the following figure: R1 10.0 kΩ (3 marks) R2 20.0 kΩ 275 V a. What is the voltage across Ri in the absence of the meter? b. Draw the circuit diagram with the meter in place and calculate the effective resistance of the circuit. c. What is the voltage across R1 with the meter connected across it?
A voltmeter has an internal resistance of 10 000 Ω and is used to measure the voltage across a 47.0-Ω resistor that, without the voltmeter connected, has a current of 1.20 A pass through it. How much current is drawn away from the circuit by the voltmeter when it is connected across the resistor? 4.7 mA 5.6 mA 1.205 A 0 A
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter in the Figure has an internal resistance of 4 x 109 2 and is used to measure the voltage across the resistor R2 as shown. Attaching this non-ideal voltmeter decreases the voltage across R2. Calculate the magnitude of this decrease using an emf of 14 V and R1 = R2 = 250 ks2. Submit Answer This question expects a numeric...
When a battery voltage is measured by placing a high-resistance voltmeter across the terminals of the battery, the voltmeter reads 6.3V. With the voltmeter leads still attached, the battery terminals are then connected to a resistor in series with an ammeter. In this arrangement, the ammeter reads 150 mA, and the voltmeter reads 5.9V. What are the emf and the internal resistance of the battery?
What is the reading on a voltmeter when it is connected to
points A and B?
What is the reading on a voltmeter when it is connected to
points B and C?
What is the reading on a voltmeter when it is connected to
points A and C?
What is the reading on a voltmeter when it is connected to
points A and D?
An ac voltmeter, which displays the rms voltage between the two points touched by its leads,...
Consider the two methods to measure the resistance of a resistor, as shown in the figures below the two-point probe method and the four-point probe method. Assume that the actual resistance of the resistor is 100 Ω, the resistance of the connecting wires is 10 Ω, the internal resistance of the ammeter is 0 Ω, and the internal resistance of the voltmeter is infinitely large 1) Determine the ammeter reading (it is equal to the current from the power supply)...
8-1 12. A voltmeter with an internal resistance of 3.08 10.2 measures the voltage R, in the following figure across Ri in the following figure: R1 10.0 kΩ (3 marks) R2 20.0 kΩ 275 V a. What is the voltage across Ri in the absence of the meter? b. Draw the circuit diagram with the meter in place and calculate the effective resistance of the circuit. c. What is the voltage across R1 with the meter connected across it?
Most questions answered within 3 hours.
-
Which food law was passed in 1996 and changed how pesticide
residues on food were regulated...
asked 13 minutes ago -
companies either hire outside programmers to
write_____ software or use their own internal developers.
asked 12 minutes ago -
A magnetic dipole m(t) = m_0*cos(ωt) can be
described as current density j(r,t) = −cm(t) ×...
asked 12 minutes ago -
Probabilities and Counting. Yahtzee is a game that involves six
fair dice. When rolling all six...
asked 14 minutes ago -
What percent of revenue does net income represent for each
year?
Total Revenue
2017 = 60,319,000...
asked 36 minutes ago -
For Ti+2 (Z=22). Determine the correct ground state
& # of microstates. Use the correct tanabe...
asked 39 minutes ago -
Why did so many investment banks have to start buying CDO’s and
other mortgaged backed securities...
asked 54 minutes ago -
The mean cost of domestic airfares in the United States rose to
an all-time high of...
asked 1 hour ago -
1.Magazine Luiza is a Brazilian retail chain for consumer
electronics. The company currently has 100 stores...
asked 1 hour ago -
What is the molarity of ZnCl2 that forms when 25.0 g of zinc
completely reacts with...
asked 1 hour ago -
For independent X and Y, we have probability density function
for them where pdf of X...
asked 1 hour ago -
The decomposition of SO2Cl2 is first order in SO2Cl2 and has a
rate constant of 1.42...
asked 1 hour ago