Paths Through a Uniform Magnetic Field; Solenoids; Net Magnetic Field

1) The figure (*see attachment) shows 11 paths through a region of uniform magnetic field. One path is a straight line; the rest are half circles. The table (*see attachment) gives the masses, charges and speeds of the 11 particles that take these paths through the field in the direction shown. Which path corresponds to which pa ...continues

Electricity Problems (Magnetic Flux; Magnetic Field; Current; Voltage; Energy; Resistance; Reactance; Frequency)

I need help with the attached electricity problems. Example: 1) A piece of copper wire is formed into a single circular loop of radius 17 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.64 T in a time of 0.65 s. The wire has a resistance per unit length of 4.9 x 10-2 OHM/m. ...continues

Lab Questions

1) Does the law of Reflection apply to microwaves when they strike a metallic plate?Explain. 2)Does the Law of Refraction apply to microwaves when they strike a prism? ex. does this prodice constant values... Explain.

questions on circuits and ohms law

i have 6 questions that i am strugling with, i need the answers to these to continue further. please see attached

Wavelength

A cord is 20cm long, four complete waves fit along its length when vibrated 30 times per second for the waves on the cord. What is the wavelength? What is the frequency? What is the speed?

Electricity, Magnetism and Waves - Study Problems

STUDY PROBLEMS 1) The drawing shows a crystalline slab (n = 1.402) with a rectangular cross section. A ray of light strikes the slab at an incident angle of θ1 = 44°, enters the slab, and travels to point P. This slab is surrounded by a fluid with a refractive index n. What is the maximum value of n such that total inter ...continues

Current Flowing Through a Membrane

"A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 x 10^7 ohm x meters. If the potential difference between the inner and outer surfaces of a cell membrane is 75 mV, how much current flows through a square area of membrane 1.1 micro meters on a side?" Here's what I did -- I'm not sure what I did ...continues

Solenoid

"To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 12 cm in diameter and 55 cm in length. You would like a 2.0 A current to produce a 2.3 kG magnetic field inside your solenoid. What is the total length of wire you will need to meet these specifications?" Here's what I've done so far: 2.3 kG ...continues

Magnitude and Direction of Net Force on Loop

A long straight wire carries a current of 31 A to the right. Next to the wire is a square loop with sides 1.0 m in length, as shown in the figure below. The loop carries a current of 2.7 A in the direction indicated. 1. Calculate the magnitude and direction of the net force acting on the loop. 2. If the loop is extended in ...continues

2 parallel wires, magnitude and direction of magnetic field

"Two parallel wires, each carrying a current of I = 1.8 A, are shown in the figure below, where d = 7.1 cm. The current in wire 1 is in the opposite direction of wire 2. Find the direction and magnitude of the net magnetic field at points A, B, and C." Please see attached for full question.