A voltmeter is a device used to measure the voltage difference across resistors in a circuit. To use a voltmeter it should be connected in with a resistor; an ideal voltmeter has parallel; zero series; zero series; infinite parallel; infinite internal resistance.
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- Look at a circuit made up of a resistor, a battery, a capacitor, and a switch. Take the time constant of the circuit to be 3.12 seconds. So if the resistor has a current of 420 mA and a voltage of 12.0 V when the switch is closed, calculate the capacitance of the capacitor.In measuring a voltage, a voltmeter uses some current from the circuit. Consequently, the voltage measured is only an approximation to the voltage present when the voltmeter is not connected. Consider a circuit consisting of two 2060- resistors connected in series across a 50.0-V battery. (a) Find the voltage across one of the resistors. (b) A voltmeter has a full-scale voltage of 50.0 V and uses a galvanometer with a full-scale deflection of 5.45 mA. Determine the voltage that this voltmeter registers when it is connected across the resistor used in part (a). (a) Number i (b) Number i R Units Units Voltmeter Rv www + V ww R (G)You wish to measure both the current through and the potential difference across some component of a circuit. It is not possible to do this simultaneously and accurately with ordinary voltmeters and ammeters. Explain why not.
- Design a circuit with a bulb, resistor(s), capacitor, and battery where the bulb gradually decreases in brightness but does not turn off.moodle.nct.edu.om/mod/quiz/attempt.php?at: Te-Learning Portal Courses Reports - I My courses / PHYS1100 / Homework No.2 / Homework No oving Forward e-Services- Academic Departments - ETC - CIMS - mut of 10.0 0 question (v 2.5 V Figure shows a circuit which consists of a battery connected in series with a 10.0 O resistor. The potential difference across the resistor is measured as 2.5 V. If the internal resistance of the battery is 20, 1. The current through the circuit is = 2. The emf of the battery is = E 44 a OA 6. 16 CD 17 CD 19 O noe 12 2. 23 $ 6. 7 Y F 1 GY Wock Xo C{ V } alt * 19 上不. Why might a circuit breaker open if you plug too manyelectrical devices into a single circuit?(a) The voltage becomes too high.(b) The current becomes too high.(c) The resistance becomes too high.(d) A circuit breaker will not “trip” no matter how manyelectrical devices you plug into the circuit
- Two identical resistors of 276 Ohms are configured in parallel and connected to a 13.3V power supply. If the same two resistors are then connected in series,what should the voltage of the power supply by charged to such that the parallel and series configurations draw the same amount to power?Te-Learning Portal Courses - Reports e-Services ▼ Academic Departments - ETC - CIMS Salim During an experiment to verify Ohm's law, the voltage supplied and the current through a circuit are measured. [Voltage is measured in Volt (V) and current in Ampere (A)]. ww R on Battery The measured value of the current is I = 3.1 ± 0.2 A and that of the voltage is V = 14 0.5 V. The resistance of the circuit (in N) can be calculated using the formula, R = V/I, Calculate the, a) Resistance (in 2) = b) Fractional uncertainty in the resistance = c) Absolute uncertainty (in 2) in the resistance=Imagine a hypothetical universe where Ohm's law still holds true, but the nature of matter allows for electrical resistors to possess negative resistance values. In such a universe, how would the rules for combining resistors in series and parallel change? Furthermore, how could this altered physics influence the functioning of basic electrical circuits and energy conservation principles?
- Convince yourself that the product of the resistance and capacitance is as shown: SɛE · dŠ (-SẼ • dī, SẼ · dÏ\ RC = If a capacitor with relative permittivity of 3.2 has a capacitance of 12 pF, determine its resistance if the resistivity the material is 1010 Mega Om 23.61112 x 1015 n O 23.61112 × 10-15 o O 14.1667 x 1015 o O 14.1667 x 10-15 QIn measuring a voltage, a voltmeter uses some current from the circuit. Consequently, the voltage measured is only an approximation to the voltage present when the voltmeter is not connected. Consider a circuit consisting of two 1760- resistors connected in series across a 50.0-V battery. (a) Find the voltage across one of the resistors. (b) A voltmeter has a full-scale voltage of 50.0 V and uses a galvanometer with a full-scale deflection of 6.85 mA. Determine the voltage that this voltmeter registers when it is connected across the resistor used in part (a). ww R Voltmeter Ry F V RWhen switch S in (Figure 1) is open, the voltmeter V of the battery reads 3.13 V. When the switch is closed, the voltmeter reading drops to 2.93 V, and the ammeter A reads 1.69 A. Assume that the two meters are ideal, so they don't affect the circuit. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A source with a short circuit. Figure S V r E -ww+ R A 1 of 1 Find the emf. Express your answer in volts. E = Submit Part B r = Find the internal resistance r of the battery. Express your answer in ohms. Submit Part C Π| ΑΣΦ Request Answer R= | ΑΣΦ Request Answer Find the resis ance R. Express your answer in ohms. IVE| ΑΣΦ ? ? ? V Ω Ω