In the circuit shown below the ammeter consists of a
galvanometer, with resistance Rg = 100 Ω, in parallel with a
‘shunt’ resistor, Rs = 2.00 Ω. The current, Ig, flowing through the
galvanometer is 22.1 mA. The external circuit resistance is Rc =
20.0 Ω. If the EMF of the cell is 25.0 V, what is its internal
resistance?
Homework Answers
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In the circuit shown below the ammeter consists of a
galvanometer, with resistance Rg = 100...
I1 Suppose that the current to be measured by an ammeter is so large that a galvanometer deflecte...
I1 Suppose that the current to be measured by an ammeter is so large that a galvanometer deflected by the current would be pinned at its maximum reading. This problem can be resolved by the use of a shunt resistor (Fig. 27-45). Show that with the shunt resistor (resistance R,) present, the current I is given in terms of a reduced current lG flowing through the galvanometer by the formula IIG[1 + (RG/R,)], where RG is the resistance of the...
Assume that the ammeter you are using in circuit analysis is made from a galvanometer with...
Assume that the ammeter you are using in circuit analysis is made from a galvanometer with 70 Ω of resistance and a shunt resistor. The galvanometer has a maximum reading when 0.002 A flows through it. The ammeter, however, can make a maximum reading of 3.0 A. Determine the value of the shunt resistor.
Part A A galvanometer having a resistance of 20.0 12 has a 1.00 N2 shunt resistance...
Part A A galvanometer having a resistance of 20.0 12 has a 1.00 N2 shunt resistance installed to convert it to an ammeter. It is then used to measure the current in a circuit consisting of a 15.0 12 resistor connected across the terminals of a 25.0 V battery having no appreciable internal resistance. What current does the ammeter measure? IVO AQ – 2 ? Submit Request Answer Part B What should be the true current in the circuit (that...
A galvanometer of resistance 100 Ω gives full-scale deflection when its current is 1.0 mA. It...
A galvanometer of resistance 100 Ω gives full-scale deflection when its current is 1.0 mA. It is used to construct an ammeter whose full-scale reading is 100 A. If the shunt resistor consists of a piece of 10-gauge copper wire (diameter 2.59 mm), what should its length be
The coil of wire in a galvanometer has a resistance of RC = 75.0 Ω. The...
The coil of wire in a galvanometer has a resistance of RC = 75.0 Ω. The galvanometer exhibits a full-scale deflection when the current through it is 0.200 mA. A resistor is connected in series with this combination so as to produce a voltmeter. The voltmeter is to have a full-scale deflection when it measures a potential difference of 14.0 V. What is the resistance of this resistor?
A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be add...
A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA, and how should this resistor be connected to the galvanometer? Answer a. 75.0 ? in parallel with the galvanometer b. 50.0 ? in parallel with the galvanometer c. 50.0 ? in series with the galvanometer d. 100 ? in parallel with the galvanometer...
In the circuit shown, V = 70 volts and the internal resistance of the battery can...
In the circuit shown, V = 70 volts and the internal resistance of the battery can be considered negligible. (a) What is the equivalent resistance of the two resistor parallel combination? (b) What is the equivalent resistance for the entire circuit? (c) What is the total current flowing through the battery? (d) What is the current flowing through the 8 Ω resistor? (e) What is the current flowing through the 6 Ω resistor? (f) What is the current flowing through...
The circuit shown has three identical resistors in series with device for measuring current (an ammeter)....
The circuit shown has three identical resistors in series with device for measuring current (an ammeter). The value of the emf shown is 9.99 V,9.99 V, and each resistor has a value of 120 Ω.120 Ω. Part A: What is the total resistance of this circuit (?eq)?(Req)? ?eq=Req= ΩΩ Part B: What is the value of the current (?)(I) flowing out of the emf? ?=I= A Part C: What is the value of the voltage drop (Δ?)(ΔV) across the second...
Given that a certain galvanometer has an internal resistance of 254 Ω and can handle a...
Given that a certain galvanometer has an internal resistance of 254 Ω and can handle a maximum current of 250 μA, design an ammeter capable of reading at full-scale deflection (the maximum current without burning up the meter) 10 A and a voltmeter capable of reading at full-scale deflection 10 V. Assume that the space available in the meter for the shunt (for the ammeter) or limiting (for the voltmeter) resistor is no more than 5 mm in length and...
A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be add...
A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a milliammeter capable of reading up to 4.00 mA? Please explain the answer.
I1 Suppose that the current to be measured by an ammeter is so large that a galvanometer deflected by the current would be pinned at its maximum reading. This problem can be resolved by the use of a shunt resistor (Fig. 27-45). Show that with the shunt resistor (resistance R,) present, the current I is given in terms of a reduced current lG flowing through the galvanometer by the formula IIG[1 + (RG/R,)], where RG is the resistance of the...
Part A A galvanometer having a resistance of 20.0 12 has a 1.00 N2 shunt resistance installed to convert it to an ammeter. It is then used to measure the current in a circuit consisting of a 15.0 12 resistor connected across the terminals of a 25.0 V battery having no appreciable internal resistance. What current does the ammeter measure? IVO AQ – 2 ? Submit Request Answer Part B What should be the true current in the circuit (that...
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