Questions from Modern Physics

Q: The vertical deflecting plates of a typical classroom oscilloscope are a pair

The vertical deflecting plates of a typical classroom oscilloscope are a pair of parallel square metal plates carrying equal but opposite charges. Typical dimensions are about 3.0 cm on a side, with a...

Q: An ideal ammeter A is placed in a circuit with a battery

An ideal ammeter A is placed in a circuit with a battery and a light bulb as shown in Fig. Q25.15a, and the ammeter reading is noted. The circuit is then reconnected as in Fig. Q25.15b, so that the po...

Q: Electrostatic precipitators use electric forces to remove pollutant particles from smoke,

Electrostatic precipitators use electric forces to remove pollutant particles from smoke, in particular in the smokestacks of coal-burning power plants. One form of precipitator consists of a vertical...

Q: A disk with radius R has uniform surface charge density

A disk with radius R has uniform surface charge density

Q: A solid sphere of radius R contains a total charge Q distributed

A solid sphere of radius R contains a total charge Q distributed uniformly throughout its volume. Find the energy needed to assemble this charge by bringing infinitesimal charges from far away. This e...

Q: A fuel gauge uses a capacitor to determine the height of the

A fuel gauge uses a capacitor to determine the height of the fuel in a tank. The effective dielectric constant Keff changes from a value of 1 when the tank is empty to a value of K, the dielectric con...

Q: Charge Q = +4.00 µC is distributed uniformly over

Charge Q = +4.00 µC is distributed uniformly over the volume of an insulating sphere that has radius R = 5.00 cm. What is the potential difference between the center of the sphere and the surface of t...

Q: An insulating spherical shell with inner radius 25.0 cm and

An insulating spherical shell with inner radius 25.0 cm and outer radius 60.0 cm carries a charge of +150.0 µC uniformly distributed over its outer surface. Point a is at the center of the shell, poin...

Q: You are conducting experiments with an air filled parallel-plate capacitor

You are conducting experiments with an air filled parallel-plate capacitor. You connect the capacitor to a battery with voltage 24.0 V. Initially the separation d between the plates is 0.0500 cm. In o...

Q: a). If a spherical raindrop of radius 0.650 mm

a). If a spherical raindrop of radius 0.650 mm carries a charge of -3.60 pC uniformly distributed over its volume, what is the potential at its surface? (Take the potential to be zero at an infinite d...