ac generator

An AC generator consists of eight turns of wire, each of area .0756 m^2, and a total resistance of 8.38 Ohms. The loop rotates in the external magnetic field of strength .35 T at a constant frequency of 59.7 Hz. What is the maximum induced emf? Units if V What is the maximum induced current? Units of A

inductor

The current in a 48.1 mH inductor changes with time as I = bt^2 - at. With a = 2.7 A/s and b = 3 A/s^2, find the magnitude of the induced emf at t = .992 s. Units of V At what time is the emf zero? Units of s

conducting rod

Consider a rotating conducting rod with length a. It is fixed at the end O and is rotating clockwise with angular frequency, omega. The rotation occurs in a region in which there is a constant, uniform magnetic field perpendicular to the plane of rotation. The magnitude of this field is B. What is the magnitude of the el ...continues

coaxial cable

A coaxial cable consists of a wire of radius 'a' surrounded by a concentric conducting sleeve of inner radius 'b' and outer radius 'c'. A current flows in the wire of radius 'a' out of the page; this current is spread uniformly over the cross section of the wire. An equal current flows in the opposite direction in the sleeve; ...continues

convex lens

A convex lens of focal length 7.5 cm is placed 12 cm to the left of a convex lens with a focal length of 6.5 cm. An object is placed 10.0 cm to the left of the lens with a focal length of 7.5 cm. Find the location of the image and its character (e.g., real, inverted) (A ray diagram may prove to be helpful also, even if it ...continues

battery

Suppose a 6 volt battery, a 10 ohm resistor, a 15 uf capacitor, and a switch are hooked up in series while the switch is open. The switch is closed at the same instant that a stopwatch is started. Describe what happens both qualitatively and as quantitatively as you can.

Physics

Physics study material

Find the current

Find the current which flows through each of the four resistors in the figure.

Voltage difference

Imagine a space station module shaped like a cylinder 30 m long and 5 m diameter orbiting close to the earth above the earth's equator. What would be the maximum potential difference that could develop between the ends of the module? How would the module have to be oriented to get this maximum voltage difference? Could this v ...continues

Voltage difference, flow

Imagine that we have two metal rails 20 cm apart connected by a light bulb. The rails are placed in a 1.0 T magnetic field oriented vertically downward. We then constrain a bar to slide on the rails toward the lightbulb in this magnetic field. How fast do we have to move the bar to put a voltage difference of 3.0 V across the ...continues