The following image is of a voltmeter, which measures electric potential, in volts (V). A:A: What is the smallest increment on the voltmeter? B:B: What is the uncertainty? Select two answers: one for question AA and one for question B.
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The following image is of a voltmeter, which measures electric potential, in volts (V).
A:A: What is the smallest increment on the voltmeter?
B:B: What is the uncertainty?
Select two answers: one for question AA and one for question B.
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- For problem 4 part b in square centimeters using inner and outer radii of the spherical capacitor of a = 5.49 cm and b = 1.05 a, respectively. (Answer In 5 sig. figs.)A student measured the potential difference between two ends of a straight wire of length 0.50 m and diameter 2.0 mm for different electric currents running through the wire. The student plotted the potential difference (in volts) as a function of the electric current (in ampères) with the goal of calculating the resistivity of the material. The graph, including the trendline, is shown in Figure 2b. Based on this experiment, the resistivity of the material is: 1.68 x 10-6 Q m 4.19 x 10-5 0 m 1.68 x 1052 m 0.00419 2 m 4.19 x 10-7 o m O 0.00168 Q m 1.33 x 10-7a m 1.33 x 10-8 o m AMoving to th e poxt question provopts cha ngos te this answorProblem 15: Two different wires, of the same cross-sectional area, are connected in series as part of a circuit. The conductivity of wire 1 is larger than the conductivity of wire 2. Part (a) If the electric field in wire 1 is E1, and the electric field through wire 2 is E2, write an expression for the ratio between the conductivity of the two wires. σ1 / σ2 = ______ Part (b) If E1 = 0.85 V/m and E2 = 0.061 V/m, what is the ratio between the conductivity of the wires? σ1 / σ2 = ______
- For problem 24a (part a), what would the velocity of the electron (in units of 10^7 m/s) be if the electron were accelerated by a voltage difference of 338 V? (5 sig figs)Q = Qo e* (C36) d) The capacitor charge in the circuit below decays exponentially when the capacitor has an initial charge of Qo: URC. Give brief physics (not math!) explanations for the observation that the time constant (how long it takes to discharge) is proportional to both C and R. Why is the time constant proportional to R (i.e. why does it take longer when R is bigger)? Why is the time constant proportional to C (i.e. why does it take longer when C is bigger)? R CProblem 1: The voltage across a membrane forming a cell wall is 83 mV and the membrane is 7.75 nm thick. What is the electric field strength in the cell wall, in volts per meter?
- Equation1: Q(t)=CVcap(t) Equation 2: Qcharging(t)=CV(1−e^(−t/RC)) 1. Combine equations 1 and 2 to create an equation capable of finding the time-dependent voltage across a charging capacitor. Equation 3: I(t)≡(dQ(t))/(dt) 2. Combine equations 2 and 3 to create an equation capable of finding the time-dependent current across a charging capacitor.A parallel plate capacitor has an air-filled gap. It is attached an EMF and charged it to charge Qo and voltage difference ΔVco. Two different experiments are done. Case A: The gap between the capacitor plates is then filled with Teflon with the capacitor still connected directly across the terminals of the EMF. Case B: The capacitor is disconnected from the EMF first before the gap in between the plates is then filled with Teflon. Which statement is true after the Teflon is inserted into the gap? 1.) In case A, ΔVc is unchanged but Q increases to keep the net E field between the plates unchanged. In case B, Q is unchanged but ΔVc decreases due to a smaller net E field between the plates. 2.) In case A, Q is unchanged but ΔVc decreases due to a smaller net E field between the plates. In case B, ΔVc is unchanged but Q increases to keep the net E field between the plates unchanged. 3.) In case A, Q is unchanged but ΔVc increases due to a larger net E field between the plates. In case…In the Millikan oil drop experiment, the charge of an electron is measured by placing an ionized oil drop of mass, m, and net charge, e, between the conducting plates of a parallel plate capacitor that produces a vertically downward electric field as shown in the diagram below. If the electron is in static equilibrium between the plates, which of the following is the correct expression for the electron charge of magnitude e? The voltage difference between the capacitor plates is V and the distance between the plates is d. a. V/(mgd) b. mgV/d c. d/(mgV) d. Vd/mg e. mgd/V
- Q. The ends of the cylinder are made of conducting discs and the space between these discs are filled with an inhomogeneous ohmic medium whose conductivity o = L/(z+1). Where L is the separation distance of the discs. A d-c voltage Vo is applied across the discs as shown on the right. Determine V. a) The total resistance between the discs b) The surface charge densities on the discs c) The volume charge density and the total amount of charge between the discsDetermine the energy stored by C2 and C3 when Cl = 20 µF, C2 = 10 µF, C3 = 14 µF, C4 = 30 µF, and VO =50 V. Select one: a. 0.32 mc b. 0.24 mc c. 0.40 mc d. 0.16 mc e. 0.50 mcIn Figure (a) below, a 11.16 V battery is connected to a resistive strip that consists of three sections with the same cross-sectional areas but different conductivities. Figure (b) gives the electric potential V(x) versus position x along the strip. The horizontal scale is set by xs = 10.16 mm. Section 3 has conductivity 3.008 × 10' (2·m)-1. What is the conductivity of section (a) 1 and (b) 2? x= 0 x= X5 (a) (b) x (mm) (a) Number Units (b) Number Units (A) A