Chapter 28: Q. 66 (page 794)
How much current flows through the bottom wire in , and in which direction ?
Short Answer
The current flow through the bottom wire isto the right direction.
Chapter 28: Q. 66 (page 794)
How much current flows through the bottom wire in , and in which direction ?
The current flow through the bottom wire isto the right direction.
All the tools & learning materials you need for study success - in one app.
Get started for freeAn oscillator circuit is important to many applications. A simple oscillator circuit can be built by adding a neon gas tube to an RC circuit, as shown in . Gas is normally a good insulator, and the resistance of the gas tube is essentially infinite when the light is off. This allows the capacitor to charge. When the capacitor voltage reaches a value Von, the electric field inside the tube becomes strong enough to ionize the neon gas. Visually, the tube lights with an orange glow. Electrically, the ionization of the gas provides a very-low-resistance path through the tube. The capacitor very rapidly (we can think of it as instantaneously) discharges through the tube and the capacitor voltage drops. When the capacitor voltage has dropped to a value , the electric field inside the tube becomes too weak to sustain the ionization and the neon light turns off. The capacitor then starts to charge again. The capacitor voltage oscillates between , when it starts charging, and , when the light comes on to discharge it.
a. Show that the oscillation period is
b. A neon gas tube has . What resistor value should you choose to go with a capacitor and a battery to make a oscillator?
You’ve made the finals of the Science Olympics! As one of your tasks, you’re given 1.0 g of aluminum and asked to make a wire, using all the aluminum, that will dissipate 7.5 W when connected to a 1.5 V battery. What length and diameter will you choose for your wire?
For the circuit shown in FIGURE , find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.
What value resistor will discharge a capacitor to of its initial charge in ?
Compared to an ideal battery, by what percentage does the battery’s internal resistance reduce the potential difference across the resistor in FIGURE EX28.20?
What do you think about this solution?
We value your feedback to improve our textbook solutions.