Homework Answers
If we want to measure resistance R, first we need to measure the potential difference (voltage) V across it using the Voltmeter and then we need to measure the current through it using the Ammeter.
Note that Voltmeter is always to be connected in PARALLEL to the resistance and Ammeter is always to be connected in SERIES (just beside the resistance) to the resistance.
After measuring voltage V and current I, divide V by I to get resistance R.
According to ohms law, V =IR => R = V/I
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How do you use a voltmeter and ammeter to measure the resistance of a resistor connected...
You have a 10 ohm resistor connected in series with an ammeter. The voltage applied to...
You have a 10 ohm resistor connected in series with an ammeter. The voltage applied to the whole circuit is 1.2 volts. At the same time you have a voltmeter connected across the 10 ohm resistor and voltmeter reads 0.9 volts. The circuit draws a total of 0.5 amps. Can you determine resistance of the ammeter?
help You are given a battery (DC power), two resistors (R1 and R2), one DC voltmeter...
help
You are given a battery (DC power), two resistors (R1 and R2), one DC voltmeter and one DC ammeter. Draw a diagram for the two cases, clearly label the connections of the ammeter and voltmeter. R1 and R2 are connected in series. Use the voltmeter to measure the voltage of R1 and use the ammeter to measure the current. R1 and R2 are connected in parallel. Use the voltmeter to measure the voltage of R1 and use the ammeter...
A cell with emf 15V and internal resistance 5.60 is connected in series to an ammeter...
A cell with emf 15V and internal resistance 5.60 is connected in series to an ammeter and a 0-3.9M2 variable resistor. A voltmeter is connected across the terminals of the cell a) Sketch the circuit diagram b) Describe how this circuit can be used to obtain a value for the emf of the cell c) Sketch and label thegraph d) Calculate the terminal voltage when a current of 87.9mA is measured by the ammeter e) Calculate the load resistance when...
Exercise 2. An instrument used to measure current is called an ammeter. The ammeter is connected...
Exercise 2. An instrument used to measure current is called an ammeter. The ammeter is connected into a circuit in series in the loop in which the desired current reading is required. The resistance of an ideal ammeter is zero, and it is essential in real ammeters that the resistance of the instrument be very small compared to other resistances in the circuit. Why? R2 Ri a)-A meter to measure potential difference is called a voltmeter. To find the potential...
Question One: In the figure below, what is the reading on the ammeter in each case...
Question One: In the figure below, what is the reading on the ammeter in each case .5 .6 (A) If you connected the circuit to the 3A setting on the ammeter, then the reading will be (B) If you connected the circuit to the 1A setting on the ammeter, then the reading will be (C) If you connected the circuit to the 300 mA setting on the ammeter, then the reading will be uestion Two: (A) Is the equivalent resistance,...
15 Electrical Circuits Lab E: PARALLEL CIRCUITS Name wr w¡ฆ now discover how cument, voltage, and...
15 Electrical Circuits Lab E: PARALLEL CIRCUITS Name wr w¡ฆ now discover how cument, voltage, and r cireuit. Set the power supply at 1.5 V for this lab, or use a single dry cell EXCEED ISV resistance eperate in any parallel 1.5 Do NOI Step 1: Set sp a circuit with a power supply set at 1.5 V and two resistors as shown in diagram A. The ammeser is positioned to measure the current entering Diagram A resistor one (Rj...
A light bulb and a resistor are connected in series to a variable power supply. A...
A light bulb and a resistor are connected in series to a variable power supply. A student first connects a voltmeter and an ammeter to measure the current through and the voltage across the bulb, as shown in the left circuit below. The student varies the power supply voltage and records the readings on the meters. Power Supply Power Supply The student then places the voltmeter across the resistor as shown in the right circuit above, and repeats the experiment....
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)...
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo-...
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo- nent. It is devised to be a device that has a VERY LOW internal resistance r. You use the device by connecting the device in series with the branch of the circuit you want to measure the current through. Suppose you accidentally connected the ammeter in parallel with a bat- tery and another resistor (with resistance R»r). Using Kirchoff's rules, show that when s...
1. How is a voltmeter inserted in a circuit in order to measure voltage? 2. How...
1. How is a voltmeter inserted in a circuit in order to measure voltage? 2. How is an Ammeter inserted into a circuit to measure current? 3. What does a voltmeter represent in a circuit? What is the significance of this? esi 4. If resistance is increased and current is constant, what happens to voltage at that r 5. If the current through a resistor is increased, what happens to voltage drop at that resistor? 6. What is the relationship...
help
You are given a battery (DC power), two resistors (R1 and R2), one DC voltmeter and one DC ammeter. Draw a diagram for the two cases, clearly label the connections of the ammeter and voltmeter. R1 and R2 are connected in series. Use the voltmeter to measure the voltage of R1 and use the ammeter to measure the current. R1 and R2 are connected in parallel. Use the voltmeter to measure the voltage of R1 and use the ammeter...
A cell with emf 15V and internal resistance 5.60 is connected in series to an ammeter and a 0-3.9M2 variable resistor. A voltmeter is connected across the terminals of the cell a) Sketch the circuit diagram b) Describe how this circuit can be used to obtain a value for the emf of the cell c) Sketch and label thegraph d) Calculate the terminal voltage when a current of 87.9mA is measured by the ammeter e) Calculate the load resistance when...
Exercise 2. An instrument used to measure current is called an ammeter. The ammeter is connected into a circuit in series in the loop in which the desired current reading is required. The resistance of an ideal ammeter is zero, and it is essential in real ammeters that the resistance of the instrument be very small compared to other resistances in the circuit. Why? R2 Ri a)-A meter to measure potential difference is called a voltmeter. To find the potential...
Question One: In the figure below, what is the reading on the ammeter in each case .5 .6 (A) If you connected the circuit to the 3A setting on the ammeter, then the reading will be (B) If you connected the circuit to the 1A setting on the ammeter, then the reading will be (C) If you connected the circuit to the 300 mA setting on the ammeter, then the reading will be uestion Two: (A) Is the equivalent resistance,...
15 Electrical Circuits Lab E: PARALLEL CIRCUITS Name wr w¡ฆ now discover how cument, voltage, and r cireuit. Set the power supply at 1.5 V for this lab, or use a single dry cell EXCEED ISV resistance eperate in any parallel 1.5 Do NOI Step 1: Set sp a circuit with a power supply set at 1.5 V and two resistors as shown in diagram A. The ammeser is positioned to measure the current entering Diagram A resistor one (Rj...
A light bulb and a resistor are connected in series to a variable power supply. A student first connects a voltmeter and an ammeter to measure the current through and the voltage across the bulb, as shown in the left circuit below. The student varies the power supply voltage and records the readings on the meters. Power Supply Power Supply The student then places the voltmeter across the resistor as shown in the right circuit above, and repeats the experiment....
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)...
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo- nent. It is devised to be a device that has a VERY LOW internal resistance r. You use the device by connecting the device in series with the branch of the circuit you want to measure the current through. Suppose you accidentally connected the ammeter in parallel with a bat- tery and another resistor (with resistance R»r). Using Kirchoff's rules, show that when s...
1. How is a voltmeter inserted in a circuit in order to measure voltage? 2. How is an Ammeter inserted into a circuit to measure current? 3. What does a voltmeter represent in a circuit? What is the significance of this? esi 4. If resistance is increased and current is constant, what happens to voltage at that r 5. If the current through a resistor is increased, what happens to voltage drop at that resistor? 6. What is the relationship...
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