You are to connect resistors R₁ and R₂, with R₁ > R₂, to a battery, first individually, then in series, and then in parallel. Rank those arrangements according to the amount of current through the battery, greatest first. and R₂ in parallel) > (R₂) > (R₁) > (R₁ and R₂ in series) O (R₂) > (R₁) > (R₁ and R₂ in series) > (R₁ and R₂ in parallel) O (R₂) > (R₁) > (R₁ and R₂ in parallel) > (R₁ and R₂ in series) O (R₁ and R₂ in series) > (R₁) > (R₂) > (R₁ and R₂ in parallel)

Consider an uncharged capacitor and a resistor that are connected in series to a = 15 V battery as shown. Find the charge on the capacitor as a function of time t when C = 20 µF, and R=4.0 × 10³ Q, ○ Q(t) = 150 (1-e-0.750t) μC ○ Q(t) = 600 (1-e-0.250) μC O Q(t) = 300 (1-e-0.125t) μC ○ Q(t) = 300 (1-e-0.250) μC ○ Q(t) = 600 (1-e-0.125t) μC

Given two batteries: one with voltage V and internal resistance r1; another with also voltage V and internal resistance r2. Which of the following is true if we connect them in series with different polarity (facing the opposite direction)?

A circuit consists of a resistor R1 = 126 Ω, a resistor R2 = 275 Ω, a capacitor C = 182 mF, a switch, and an e = 3.00-Vbattery, all connected in series. Initially the capacitor is uncharged and the switch is open. At time t = 0 the switch isclosed. (a) What charge will the capacitor have a long time after the switch is closed? (b) At what time will the chargeon the capacitor be 80.0% of the value found in part (a)?

Subject: physics

In Figure 27-40, the resistances are R₁ = 1.20 2, R2 = 1.80 2, and the ideal batteries have emfs 1 = 2.0 V, and 2 = E3 = 5.0 V. R₁ R₁ a R₂ જ્જ R₁ 182 R₁ (a) What is the current through each battery? (Take upward to be positive.) battery 1 battery 2 battery 3 (b) What is the potential difference Va - Vb? Fig. 27-40

You are to connect resistors R1 and R2, with R1 > R2, to a battery, first individually, then in series, and then in parallel. Rank those arrangements according to the amount of current through the battery, greatest first.

Two cells of emfs E, = 1.5 V and E,= 2.0 V and inter- nal resistances r, = 1.0 Q and r2 = 1.5 N respectively are connected to an external resistor R = 2.5 2 as %3| %3D shown in Fig. 22.23. Find the potential difference (a) between points A and B (b) between points A and C (c) across R. E1 E2 А r2 E D ww R Fig. 22.23

Initially, a single resistor R1 is wired to a battery.Then resistor R2 is added in parallel. Are (a) the potential difference across R1 and (b) the current i1 through R1 now more than, less than, or the same as previously? (c) Is the equivalent resistance R12 of R1 and R2 more than, less than, or equal to R1? (d) Is the total current through R1 and R2 together more than, less than, or equal to the current through R1 previously?

An initially uncharged parallel plate capacitor is connected to a circuit containing a battery with emf 8-42V and a resistor, R = 4.9MQ as shown in the figure to below. The capacitor whose plates have an area of A = 7.1mm² are separated by a distance of d = 5mm and one third of the capacitor is filled with a dielectric material, K₁ = 3.5 and the rest (two thirds) is filled with another dielectric material, K₂ = 3.4. At t=0 the switch is closed. 5.4 seconds after the switch is closed the electric field within the first dielectric material (K₁) is observed to be 18 × 106 N/C. Find the charge on the capacitor at this instant (t = 5.4s) in terms of permitivity of free space €0? Express your answer using zero decimal place. R E Answer: S K1 K2