The Wheatstone Bridge. The circuit shown in Fig. P26.74 , called a Wheatstone bridge , is used to determine the value of an unknown resistor X by comparison with three resistors M , N , and P whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches S 1 and S 2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be balanced . (a) Show that under this condition the unknown resistance is given by X = MP / N . (This method permits very high precision in comparing resistors.) (b) If galvanometer G shows zero deflection when M = 850.0 Ω, N = 15.00 Ω, and P = 33.48 Ω, what is the unknown resistance X ? Figure P26.74
The Wheatstone Bridge. The circuit shown in Fig. P26.74 , called a Wheatstone bridge , is used to determine the value of an unknown resistor X by comparison with three resistors M , N , and P whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches S 1 and S 2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be balanced . (a) Show that under this condition the unknown resistance is given by X = MP / N . (This method permits very high precision in comparing resistors.) (b) If galvanometer G shows zero deflection when M = 850.0 Ω, N = 15.00 Ω, and P = 33.48 Ω, what is the unknown resistance X ? Figure P26.74
The Wheatstone Bridge. The circuit shown in Fig. P26.74, called a Wheatstone bridge, is used to determine the value of an unknown resistor X by comparison with three resistors M, N, and P whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches S1 and S2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown resistance is given by X = MP/N. (This method permits very high precision in comparing resistors.) (b) If galvanometer G shows zero deflection when M = 850.0 Ω, N = 15.00 Ω, and P = 33.48 Ω, what is the unknown resistance X?
Two resistors, R1 = 00 kΩ and R2 = 3.00 kΩ, are connected in parallel and their combination is connected in series to a fully charged, 150-µF capacitor. When the switch is opened, the capacitor begins to discharged. What is the time constant for the discharge?
SN
10. A 11.0 μF capacitor is connected in series to a 50.0-V battery, a
is flowing through the resistor, 5.00 ms after closing the switch?
Amp
resistor, and a switch. What is the current that
550-52 resis
0 ssf60
ssf60 ss.
50 ssf60
In the circuit, R= 30.0 kN and C = 0.100 µF. The capacitor is allowed to charge fully, and then the switch is changed from position a to
position b. What will the voltage across the resistor be 8.40 ms later?
R
where X = 64.1 V.
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY