Circuits with capacitors

There is an attachment of what the problem is. Consider the circuit shown in Figure 21-45, where R1 = 17 and R2 = 6.0 (see diagram in attachment) The capacitor is 45 microFarads and the battery is 9.0V a) Find the current flowing through the battery immediately after the switch is closed. b) Find the current in the batt ...continues

Circuits with capacitors

The figure (attached) shows a simplified circuit for a photographic flash unit. This circuit consists of a 9.0 V battery, an R = 45.0 k resistor, a 140 µF capacitor, a flashbulb, and two switches. Initially, the capacitor is uncharged and the two switches are open. To charge the unit, switch S1 is closed; to fire the flash, sw ...continues

Elotrostatics: Energy of capacitors in series and parallel

There is an attachment of what the problem is. I also wrote a little bit of what I tried. --- Consider the group of capacitors shown in Figure 21-39, where C1 = 13 µF and C2 = 6.4 µF. Terminals A and B are connected to a 9.0 V battery. Find the energy stored in each capacitor. (See diagram in attachment) ---

Circuits

There is an attachment of what the problem is. I also wrote a little bit of what I tried. --- Consider the group of resistors shown below, where R1 = 3.6 and = 8.9 V. (See diagram in attachment) (a) Find the current in each resistor in the figure. (b) Determine the potential difference between the points A and ...continues

Circuits

There is an attachment of what the problem is. I also wrote a little bit of what I tried. --- Consider the group of resistors below, where R1 = 11.2 and R2 = 7.43 . The current in the 13.8 resistor is 0.750 A. Find the current in the other resistors in the circuit. (See diagram in attachment) I don't understand ...continues

Gauss' law

A small nonconducting ball of mass m=1.0mg and charge q=2x10^-8C(distributed uniformly through its volume) hangs from an insulating thread that makes an angle of 30 degrees with a vertical, uniformly charged nonconducting sheet. Considering the gravitational force on the ball and assuming the sheet extends far vertically and in ...continues

Circuits with capacitators

The figure (attached) shows a simplified circuit for a photographic flash unit. This circuit consists of a 9.0 V battery, an R = 45.0 k resistor, a 140 µF capacitor, a flashbulb, and two switches. Initially, the capacitor is uncharged and the two switches are open. To charge the unit, switch S1 is closed; to fire the flash, sw ...continues

Electric fields, Gauss and Coulomb

1. A tiny ball (mass = 0.015 kg) carries a charge of -20 µC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground? 2.At a distance r1 from a point charge, the magnitude of the electric field created by the charge is 284 N/C. At a distance r2 from the charge, the field has a mag ...continues

Electric fields/ electric flux/ electric potential energy

1.The anode (positive terminal) of an X-ray tube is at a potential of +90 000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? (b) If the electron is initially at rest, what kinetic energy does the el ...continues

Electrical resistance of a conductor

I have to graph R vs. T from the formula of a semiconductor R=A(exp(+E/kT). I am not sure what relationship k has with T. I need it in the form of y=mx+b