A loop of wire at location X is moving toward the right with constant speed v in a region of the uniform magnetic field B, which is perpendicular to the plane of the loop. Later, the loop is at location Y and exiting the magnetic field with the same constant speed v. The process is then repeated with the loop moving at a speed of 2v. Which of the following best describes the emf in the loop at the two positions shown when the process is repeated at a speed of 2v? At location X the loop is entirely within the field. At location Y the loop is halfway out of the field.

The energy of a charged capacitor resides in its __________.

The middle sections of too long, straight wires are each bent into semicircular shapes. The two wires are placed close to each other in a plane as shown above. Point A is the center of the circle formed by the two wires. There is a current I in each wire. Which of the following best represents the direction of the magnetic field, if any, at point A due to the currents?

A small object of charge – 1.0 µC that is 0.10 m above a long, straight wire moves at a speed of 0.050 m/s parallel to the wire, as shown in the figure above. The current in the wire is 2A. what is the magnitude and direction of the magnetic force on the object?

A nonconducting sphere of radius R has a uniform volume charge density ρ. At the surface of the sphere, the electric field strength is E. if a second sphere of radius 2R was created of the same material and with the same charge density, what would be the strength of the electric field at the surface of the second sphere?

At a given instant the current and self-induced emf in an inductor are directed in the same direction. Determine the inductance if the induced emf is 17 V and the rate of change of the current is 25 kA/s.

A capacitor has been charged by connecting it to a 12 V battery. How much work was done in charging this capacitor, if at the end of charging, its charge is 2 μC?

The circuit represented in the diagram above contains four resistors and a battery. The 45 V battery has a 1 Ω internal resistance. Which of the following ranks the absolute values of the potential differences ∆V across the resistors from highest to lowest? The battery with internal resistance is shown in a dashed box at the bottom. From the left side, a wire connects to a horizontal resistor labeled R sub 1 equals 8 ohms, then branches up and down to two resistors: R sub 2 equals 6 ohms on the top path and R sub 3 equals 12 ohms on the bottom path. These branches rejoin and connect to a resistor labeled R sub 4 equals 2 ohms on the right side before returning to the battery.

Two particles each with charge -Q are a fixed distance L apart, as show above. Each particle experiences a net electric force F. A particle with a charge +q is not fixed midway between the two particles. As a result the net electric force experienced by each negatively charged particle is reduced to F/2. What is the value of +q?

A stationary loop carrying a current in a constant and uniform magnetic field may experience ___________.