Yes, the answer is A because If you are measuring any quantity in the circuit then there should not be any loss due to your instruments that you are using to measure something.
If ammeter has high resistance let's say and the circuit in which you are measuring the current has resistance then current in the circuit is
now if ammeter has resistance that is small then current
since is small we can neglect so current
so
That means for measuring current theammeter should have very small voltage so that there is no loss in the ammeter and it behaves like a short circuit.
Would the answer be A? 9. An ammeter does not apprecby l curent of the circuit...
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...
Which of the following statements is true regarding an ammeter? Ammeters have a very high resistance and are placed in parallel with a resistor. Ammeters have a very high resistance and are placed in series with a resistor. Ammeters have a very low resistance and are placed in series with a resistor. Ammeters have a very low resistance and are placed in parallel with a resistor.
3. The circuit is as shown below. Assuming that the ammeter and voltmeter are ideal, means they don't affect the current in the circuit, so an ideal voltmeter has a very high resistance while an ideal ammeter has a negligible resistance. Voltmeter www 9.0 v 24 (a) What's the ammeter and voltmeter readings with the switch 's' open (0.15 A and 3.6 V (b) What's the ammeter and voltmeter readings with the switch 's' closed? (0.38 A and 9.0V) (e)...
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...
Questions 1. Do these resistors satisfy Ohm's law? Explain your answer! 2. Is an ammeter connected in series or parallel with a circuit component? Explain. 3. Is a voltmeter connected in series or parallel with a circuit component? Explain. 4. (a) What advantage does 120-V operation offer over 240 V? (b) What disadvantages does it have?
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...
1.) A circuit consists of a power supply and two resistors R1 and R2 connected in parallel.An Ammeter is placed to measure the current out of the power supply.The power supply provides 10.6 Volts, the Ammeter shows 19.9 mA, and the resistance of first resistor is R1 = 3.0 kOhm. Deduce the current through the 2nd resistor. The answer may be given in A or in mA. 2.) A circuit consists of a power supply and two resistors R1 and...
1. Does the resistance of the whole circuit increase, decrease, or stay the same when additional light bulbs are added in parallel? 2. Does the voltage across each individual light bulb increase, decrease, or stay the same when additional light bulbs are added in parallel? 3. Are light bulbs brighter when they're connected in series or in parallel? 4. Consider a whole circuit. When the power supply is set to 12V, does the power supply provide more current to the...
The following circuits (1 & 2) are combined to form a series-parallel circuit and resulting circuit is connected to a single voltage source: A series circuit with: 5 Ohms, 3 Ohms, 12 Ohms, and 9 Ohms resistors A parallel circuit with: 30 Ohms and 50 Ohms resistors What would be the total resistance of final circuit? Group of answer choices a. 18.75 Ohms b. 52.25 Ohms c. 10.25 Ohms d. 47.75 Ohms