Induced Definition and 925 Threads

The problem states: A loop of area 4cm^2 has its plane parallel to the field lines of the magnetic field, B = 0.6t, as shown in the figure. The loop is pulled in the opposite direction of the field with a constant velocity of v = 6m/s. I am confused as to solve this because I can't...

Homework Statement a) If B (magnetic field) is perpendicular to the plane of a circular loop, then is it true that when B increases the induced emf is clockwise and when the B decreases the emf is counterclockwise? Or do you need to know whether it is pointing into/out of the page? Or would...

[SOLVED] Induced Current Homework Statement If I have a scenario where one coil is insider another, in which of the following cases will the induced current in the outer coil be the greater? The Attempt at a Solution I would say when the current in the inner coil is increasing rapidly, but I...

Homework Statement A radio antenna that receives an AM radio station that emits at 800 kHz is constituted of an inductor of 120 turns with a radius of 0.6cm. The inductor is home to an iduced emf du to a magnetic field oscillating from the radio wave. The magnetic field is...

[SOLVED] Induced emf: Faraday's Law and Lenz's Law Question The plane of a conductive loop with an area of 0.020 m^2 is perpendicular to a uniform magnetic field of 0.30 T. If the field drops to zero in 0.0045 s, what is the magnitude of the average emf induced in the loop...

Hi, everyone: I keep seeing, mostly in homological algebra, the use of "induced homomorphs" or "induced isomorphisms". I get the idea of what is going on, but I have not been able to find a formal result that rigorously explains this, i.e, under what conditions does a map...

Hi there. On my electromagnetism test there was the following question: A long solenoid with radius R has N turns per unit length and carries a current I = I_0*cos(ωt) Find the electric field inside and outside the solenoid. I got the following solutions: \vec{E} = \frac{\mu}{2} N...

ometimes people say that if you moving while lighting, there will be current induced in you, and you'll die, is it correct, and if so how the electrical circuit is closed? (They say if lighting strikes near you, from the electrical field, if you move, there will be induced current in you)

Hi! I read this article about Faraday's law, which states, that the emf will be always negative, by the formula, is this http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html"

Pressure induced transition of graphite to diamond -- homework help Homework Statement Process is being carried out at 25*C and requires an increase in pressure until he graphite and diamond are in equilibrium. The following data is given at 25*C dG(25*C, 1atm) = gdiamond - ggraphite =...

Homework Statement The solenoid has N turns of wire around a cylinder. The radius of the cylinder is "a" and length is "b." THe current of the solenoid varies as I(t)= I_{0}(1 - e^-\alphat) . I_{0} and \alpha are positive constants. Around the solenoid is a square loop of wire with side...

Homework Statement A circular loop of wire can be used as a radio antenna. If an antenna with a diameter of 20.0 cm is located a distance of 2.40 km away from a from a source with a total power of 45.0 kW at a frequency of 101 MHz, what is the maximum emf induced in the loop? (Assume that the...

Homework Statement If the current is increasing at a rate of 0.1 A/sec what would the induced emf in a loop of 0.5 m be? Homework Equations I = \frac{|emf|}{R} emf = - \frac{d}{dt} B A cos(\theta) I'm obviously missing an equation or something. Some guidance would be much...

Homework Statement The north end of a bar magnet is pushed downward toward a wire loop in the plane of the paper. In which direction is the induced current, and which way is the induced magnetic field? A. clockwise, into the paper B. clockwise, out of the paper C. counter-clockwise...

Hi, having trouble finding detailed experimental evidence to support some conceptual illustration work I am undertaking to describe a manned orbital habitat in LEO, that can function as a long-term maintenance centre. A draft schematic of the current idea can be found here...

suppose there is a region S through which the magnetic field changes with time then is the electric field induced there only or everywhere in space . if everywhere what equations does it satisfy

Imagine that there is a point charge in vicinity of an infinite grounded sheet of conductor of arbitrary shape and size such that the problem of finding the potential can be solved by using the method of images. Is their a way to prove that the total charge induced on this sheet is always equal...

Hi all, Given a map P: V-->W for vector spaces V and W and the map P*: W* --> V* we have the relationship that many of us are familiar with: For e in V, f in W, E in V* and F in W*, we can say that (P*(F))(e)=F(P(e)). This is nice and fine. So this is kind of the case for a rank 1...

Hi guys - Here's the problem I'm stuck on: In a physics laboratory experiment, a coil with 160 turns enclosing an area of 13.7 (cm^2) is rotated during the time interval 4.60×10−2(s) from a position in which its plane is perpendicular to Earth's magnetic field to one in which its plane...

A 10-cm-wide, zero-resistance slide wire is pushed toward a 2.0 ohm resistor at a steady speed of 0.50 m/s. The magnetic field strength is 0.50 T. How much power does the pushing force, 6.25*10^-4 supply to the wire? What is the magnitude of the induced current? I got 3.13*10^-4 for the...

If Y is a topological space, and f:X->Y is some mapping, we can always give X the induced topology, which consists of the preimages of the open sets in Y. However, this doesn't seem to be a good way if f is not injective. Aren't the open sets in X being left unnecessarily big? Suppose we have...

No numbers here - purely conceptual. Two thin plates carry total surface charge densities of \sigma and \sigma_{1} respectively. An uncharged conducting slab is placed in between the charged plates, and then above \sigma. What are the induced charged densities on the surfaces of the...

No numbers here - purely conceptual. Two thin plates carry total surface charge densities of \sigma and \sigma_{1} respectively. An uncharged conducting slab is placed in between the charged plates, and then outside \sigma. What are the induced charged densities on the surfaces of the...

Frequency Induced Motion Sickness? Is it true what they are saying? They are now able to send out a frequency, and it makes you feel like you have motion sickness? How is it possible to create this frequency?

Does anyone know what the necessary conditions are for a nucleus to undergo fission with a thermal neutron? I have found something for the chain reactions, but not very helpful. I want to find out the conditions for ONE nucleus to undergo fission with a thermal neutron.

well iwas going through the standard example that is there is a uniform magnetic field in aregion going into the palne and ther is a rectangular 'loop' with one side which can slide on metallic rods with constant speed v and the the relation \epsilon=BLv well the example is (almost) here well...

Hey. In class at the moment we are studying sound. Ive just read about resonance. Now, from what i understand, resonance is the induced vibration in an object from another object which is vibrating at its natural frequency, via contact with air molecules, a sound board etc. Now, the...

Homework Statement Given: u_0 = 1.25664e-6 A 2 m long large coil with a radius of 14.6 cm and 320 turns surrounds a 4.2 m long solenoid with a radius of 4.6 cm and 7700 turns. The current in the solenoid changes as I = I_0 sin (2pi*f*t) where I_0= 30 A and f=60 Hz.Inside solenoid has...

Hello ALL, I have a question about magnetism and generating electricity in a coil from a group of another coils that are alternately switched on/off (cascade). Would a current be generated from a group of coils that are switched on and off in sequence, having another coil parallel to them...

Homework Statement "A square loop of wire is held in a uniform magnetic field of .24 T directed perpendicular to the plane of the loop. The length of each side of the square is decreasing at a constant ratee of 5.0 cm/s. What is the emf induced in the loop when the length 12 cm...

Imagine a solenoid with n turns per length. Now, for an instant, in which everything looks static, the magnetic field inside the solenoid will be n \mu_0 I \mathbf e_z (choosing solenoid alinged with z-axis), and zero field outside. Now, what would happen if we change the current in time? To...

A 11.8m long steel beam is accidentally dropped by a construction crane from a height of 8.62m. The horizontal component of the Earth's magnetic field over the region is 16.7μT. What is the induced emf in the beam just before impact with the Earth, assuming its long dimension remains in a...

Homework Statement In Figure 30-52 (see attached), a metal rod is forced to move with constant velocity v along two parallel metal rails, connected with a strip of metal at one end. A magnetic field B = 0.370 T points out of the page. (a) If the rails are separated by 26.0 cm and the...

Just need to know if current goes from x to y or y to x. using right hand rule with my thumb pointing towards y and my fingers pointing down (in direction of flux lines) and my palm pointing in direction of force which is straight into the magnet indicates current is in the direction of my...

Homework Statement 15. According to Lenz's law, the direction of an induced current in a conductor due to a change in the magnetic field near the conductor will be that which tends to produce which of the following effects? a. Enhance the effect which produces it b...

A circular conducting coil with radius 2.61 cm is placed in a uniform magnetic field of 0.827 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the coil during this rotation? (b) If the...

The component of the external magnetic field along the central axis of a 50−turn coil of radius 5.0 cm increases from 0 to 1.0 T in 4.3 s. (a) If the resistance of the coil is 2.9 Ω, what is the magnitude of the induced current in the coil? (b) What is the direction of the current if the axial...

Homework Statement An eager student cycles to college at 12 m/s. The metal handle bars are 60 cm wide and cut through the vertical component of the Earth’s magnetic field that has a flux density of 50 *10^(-6) T. Calculate the e.m.f induced across the handlebars. Explain why no current would...

Homework Statement http://www.jyu.fi/kastdk/olympiads/2005/Th2.pdf http://www.jyu.fi/kastdk/olympiads/2005/Th2%20Solution.pdf (Question 3) My first doubt is why the magnetic field at the center of the coil is: |\vec B|=\frac{\mu_0 NI}{2a} and not |\vec B|=\mu_0 nI, where n=N/l...

Homework Statement A car with a vertical radio antenna 85cm long drives due east 25 m/s. The Earth's magnetic field at this location has a magnitude of 5.9 * 10-5 T and points northward, 72 degrees below the horizontal. a) Is the top or the bottom of the antenna at the higher potential? b)...

Homework Statement Assume the field inside the larger coil (.075m Radius, 1200 loops), reaches the maximum value when the smaller solenoid, (.05m radius, 1200 loops), is halfway inserted. with what constant velocity must the smaller solenoid be inserted to induce 2.3V in the larger solenoid...

Homework Statement The 2-cm (radius) current loop shown in the figure is changing from θ1 = 11 degrees to θ2 = 66 degrees in a magnetic field 2 T in 0.5 seconds. What is the magnitude of the induced emf to the nearest hundredth of a millivolt. The wire in Problem 2 has a thickness of 1.04...

Homework Statement The loop in the figure is being pushed into the 0.20 T magnetic field at 50 m/s. The resistance of the loop is 0.10 ohm. Homework Equations I=E/R E=|dmagnetic flux/dt| The Attempt at a Solution I don't know how to even start this problem all the examples give...

Homework Statement A car with a vertical radio antenna 75 cm long drives due west at 23 m/s. The Earth's magnetic field at this location has a magnitude of 5.9 10-5 T and points northward, 74° below the horizontal. Find the induced emf between the ends of the antenna. Homework Equations...

A car with a vertical radio antenna 75 cm long drives due east at 29 m/s. The Earth's magnetic field at this location has a magnitude of 5.9* 10^-5 T and points northward, 72° below the horizontal. (b) Find the induced emf between the ends of the antenna. Relevant Equations: E = BVL...

Homework Statement The magnetic field perpendicular to a circular loop of wire 23 cm in diameter is changed from +0.52 T to -0.45 T in 175 ms, where + means the field points away from an observer and - toward the observer. Homework Equations (pardon me with the equations, I am LaTeX...

In a review question, we are asked to consider a particle of mass m and charge q in a 1-D harmonic oscillator potential V(x). Light is shined on the harm. osc. with E-field E=E_{o}cos((\omega)t-kx), where k=\omega/c. (Fine, so far. It seems like a Rabi frequency problem, similar to an Ammonia...

induced emf! Hello, I am studying magnetic induction, induced emf, and faraday's law, that sort of thing. My book gives an example where the magnitude of a B-field is increasing at constant rate through an axis of a circular coil with N number of turns and a certain radius r, find the...

In a physics laboratory experiment, a coil with 210 turns enclosing an area of 12.7 cm^2 is rotated during the time interval 3.70 \cdot 10^{−2} sfrom a position in which its plane is perpendicular to Earth's magnetic field to one in which its plane is parallel to the field. The magnitude of...

say there is an infinite grounded conducting plane and a point charge of charge q is above it. the induced charge on the plane is -q and i know how to find this using the method of images to find the potential and then finding and integrating the charge density, but my text says that it should...