A 25-turn circular coil of wire has diameter 1.00 m. It is placed with its axis along the direction of the Earth's magnetic field of 50.0 μT, and then in 0.200 s it is flipped 180°. An average emf of what magnitude is generated in the coil?
The magnetic field perpendicular to a circular loop of wire 17.6cm in diameter is changed from +0.510 T to -0.450 T in 117rms, where + means the field points away from an observer and - toward the observer. Calculate the induced emf.
A 6.30cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.740T pointing up. During the course of 0.130s, the field is changed to one of 0.310 T pointing down. What is the average induced emf in the coil?
A bar is moving across a open-ended loop with resistance R in a presence of a constant perpendicular magnetic field.
A bar is moving across a open-ended loop with resistance R in a presence of a constant perpendicular magnetic field. a. At what speed should the bar be moved to produce a current of 0.500 A? b. What is the motional emf? c. What is the power dissipated by the resistor? d. What force must be applied to the bar?
Magnetism: Current flowing through a resistor, surface charge distribution, constant speed of the bar
A metal bar of mass m and length L slides without friction but with good electrical contact between two vertical metal posts. The bar and posts have negligible resistance. The posts are connected at the bottom by a resistor R. Assume the bar falls at constant speed v, and that there is a magnetic field coming out of the page.
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
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
See attached file. In the figure, ABCD is a conducting wire. A conducting bar EF is laid on top of the wire and slid toward BC with a speed of .030 m/sec. A constant magnetic field B of 2.0*10^(-5)Tesla points out of the paper. The length of BC is 1.5m and the distance of the bar from EF is initially 2.0m. 1) What is the i
A 5 meter long copper wire, with a cross sectional area of 1.0mm^2 is bent into a circle. This loop of wire is mounted in a vertical plane between the poles of a magnet. This magnet is aligned so that its field points in a horizontal direction from the west to the east; the magnitude of this field is 7.25*10^(-4)T. The loop of w
See attached file. A1. Find the current through and potential difference across each resistor in the following circuit.
A rod of length l is pivoted at one end rotates with uniform angular velocity w in a uniform magnetic field of intensity B. The magnetic fluxes are perpendicular to the plane of rotation of rod. Calculate the induced EMF across the two ends of rod.
PART ONE: A battery that supplies an emf of 6.0 V has an internal resistance of 0.20 ohm. It is connected to a load resistor of 8.8 ohms. The total Current in the entire circuit is: A) less than 0.25 A B) between 0.25 A and 0.50 A C) between 0.50 A and 1.0 A D) greater than 1.0 A PART TWO: A battery of fou
See attached files. 1. At a certain location, Earth has a magnetic field of 0.6*10^4T pointing 75 degrees below the horixontal in a north-south plane. A 10m long straight wire carries a 15A current. A) If the current is directed horizontally toward the east, what are the magnitude and direction of the magnetic force on th
Just need numaric answer for these mechanic questions. see attached
See attached file for problems of resistance, tungsten filaments, current, emf.
The mutual inductance of two coils is 0.750 H. How do I find the average emf induced in the secondary if the current in the primary reaches 6.00 A in 0.0300s?
The length of a conductor linking a magnetic field is 0.060m, and the flux density of the field is 0.040 N/Am The conductor is moving down through the flux with a velocity of 1.5 m/s. What is the induced emf?
A circular current loop made of flexible wire is located in a magnetic field B; you may keep B constant or vary it. Describe three ways an emf can be induced in the loop.
A coil of 500 turns is wound on a wooden ring having a mean diameter of 8 cm and a cross sectional area of 1.5 cm^2. Assuming relative permeability of wood is 1, calculate the self-inductance of the coil and the emf induced in it when the direction of a DC current of 5A flowing in it is reversed in 0.2 sec?