Field strength Definition and 354 Threads

I have two cathode ray tubes which generate the same amount of beam, i.e., one tube fires off x electrons per second to the screen at velocity m; the other fires off x electrons per second at velocity n. Say m=2n. 1. Is magnetic field FROM BEAMS ALONE the same?? 2. One twice the...

Homework Statement Charge A has 10 electric field lines coming out, Charge B has 20 lines coming out, and Charge C has 30 lines coming in. Which pair of these charges will have the largest force between them if placed one cm apart? Homework Equations The Attempt at a Solution Is...

[SOLVED] [101] Magnetic field strength in fN Homework Statement You have arranged that the magnetic field in a particular region of space is due North with a value of 0.01 T. An electron enters the field traveling to the West with a speed of 0.05 of the speed of light. As a result, the...

Homework Statement A heavy conductor (mass m, length [FONT="Courier New"]l, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field B is now imposed. The acceleration of gravity is 9.8...

Homework Statement Okay so, we weren't given much of a question other than "Prove the Earth's GFS is 9.81 N/KG" So what I'm asking is, with the data that I have collected, is how I go about doing this? As it stand we set up an experiment with the ticker tape machine, rolled the little buggy...

Homework Statement The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit the magnetic field at 2.4 GHz, and as they do so they emit 2.4 GHz electromagnetic waves. a) what is the magnetic field strength? b) if the maximum diameter of...

Homework Statement What is the approximate electric field strength of the electromagnetic waves radiated by a 100-W light bulb, measured 3.0m from the bulb? Homework Equations $$\vec{E}=\frac{kq}{d^{2}}$$ $$P=\frac{2kq^{2}a^{2}}{3c^{3}}$$ The Attempt at a Solution I solved for...

How do I know that the resultant filed strength acts toward Y? Thank you

Homework Statement q=4.0x10^-6C, 8.0x10^-6C d=2m Homework Equations Two charges of +4.0x10^-6 C and +8.0x10^-6C are placed 2.0m apart. What is the field strength halfway between them? The Attempt at a Solution netEa= (9.0x10^9)(4.0x10^-6C) + (9.0x10^9)(8.0x10^-6C)...

The electric field strength is 1.70×104 inside a parallel-plate capacitor with a 1.40 spacing. An electron is released from rest at the negative plate. What is the electron's speed when it reaches the positive plate? Help please...

1. A 0.180g plastic bead is charged by the addition of 0.700 x 10^10 excess electrons. What electric field strength will cause the bead to hang suspended in the air? 2. Is amount of excess electrons the exact same as the charge of the bead?? 3. I am sure you use F=qE. But I am...

Homework Statement An electron moving to the right at 3% the speed of light enters a uniform electric field parallel to its direction of motion. The electron is to be brought to rest in the space of 6.0cm. What is the strength of the field?______N/C Homework Equations F = q * E The...

Homework Statement A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1*10^6V/m/s. What is the magnetic field strength 3.0 cm from the axis? Homework Equations B= uo/(2*pi) *r/R^2*(Chang in Q/ change in...

Well I have this lab on electric field lab and what I did was measure the voltage from different distances on a parallel plate. So when I plotted the graph Voltae vs. Distance, I got a linear line and the equation was y = 85x (somewhat like that disregarding the y-intercept). My concern is what...

what are the magnitude and direction of the electrical field strength at point Z in the situation below? negatively charged sphere, x(-2.0*10-5C) is left most, 60 cm to the right of it is a positively charged sphere,Y (8.0*10-6C). Point Z is 30 cm to the right of Y. What I did: First i...

Homework Statement a) Find the altitude above the Earth's surface where Earth's gravitational field strength would be two-thirds of its value at the surface. Assume re = 6.371 103 km. __________ km (b) Find the altitude above the Earth's surface where Earth's gravitational field strength...

Question Charges at three corners of a square are shown in Figure P26.34, in which n = 9. To answer the following questions, use the letters k, Q, q, L, and m. IMAGE IS LOCATED HERE: http://www.webassign.net/knight/p26-34.gif a) Write the electric field at point P in component form. b)A...

Homework Statement What are the magnetic field strength and direction at the dot in Figure Ex32.8, in which v = 3.0*10^7 m/s? Figure Ex.32.8 is attached to the this post. r = 0.02828 m m0/4pi = 10^-7 T v = 3.0*10^7 m/s q = 1.60217653*10^-19 C Homework Equations Biot-Savart Law...

can anyone describe wat is dB level. can dB level be showed through receiver or field strength meter? thx for helping

Homework Statement A magnetron is a microwave source in which a "bunch" of electrons travel on a circular orbit in a uniform magnetic field. As the electrons pass the electrodes, a high-frequency alternating voltage difference occurs. Suppose the resonant frequency is f = 2.82×10^10 s-1...

why does magnetic field strength decrease much faster than the inverse square of the distance like gravity? Is it because the force lines have to curve back to the source? Is magnetism also carried by an "imaginary" particle? Thanks. Mr Beh

1) Methods/equipment for radioactivity detection. For my high-school Chemistry studies, needs clarification. Geiger counter: A small chamber contains a high voltage electric field inside filled with inert gas. When ionizing particles/radiation enters the chamber, it will ionise the...

Homework Statement The figure shows a vertically polarized radio wave of frequency 1.0 times 10^6 traveling into the page. The maximum electric field strength is 1000V/m. What is the maximum magnetic field strength? What is the magnetic field strength at a point where E=500V/m down What is...

Homework Statement Two very long parallel wires which are 20cm apart ,carry currents of 1.5A and 2.0A respectively, flowing in opposite directions. Calculate the magnetic field strength at following points in plane of two wires (i) midway between wires (ii)at a point 10cm from the wire...

Homework Statement The initial electric field strength between oppositely charged parallel plates is 3.0 X 10^3 N/C, what would the electric field strength become if half of the charge were removed from each plate and the separation of the plates were changed from 12 mm to 8 mm? Homework...

Homework Statement Hi after doing a experiment at school, I have come up with a graph of magnetic field strength against current. I was wondering if anyone knew what the gradent of this line or area under the line represented? Homework Equations B=KI/R? The Attempt at a Solution...

Homework Statement What is the electric field strength at the center of the triangle? Three 13.0 -cm-long rods form an equilateral triangle. Two of the rods are charged to + 19.0 nC, the third to - 19.0 nC . What is the electric field strength at the center of the triangle...

Homework Statement Hi there.this is one of those proof dealies that i think i nearly have right but i was wondering if anyone could point out if i have made too many assumptions or anything thanks. Show that if a bar magnet is suspended in a uniform magnetic field, of strength H, and is...

I have just started to learn these things(electric field strength, electric potnential energy and electric potential). I am not very clear about what they are. I would like to ask a few questions here. Why is electric field strength somtimes +ve but sometimes -ve? what does each of them...

I was wondering why for [tex] F_{\mu \nu} = [D_{\mu},D_{\nu}] = \partial_{\mu}A_{\nu}-\partial_{\nu}A_{\mu}+[A_{\mu},A_{\nu}] [\tex] the term [tex] A_{\mu}\partial_{\nu} - A_{\nu}\partial_{\mu} [\tex] vanishes.

What are the units of the electric field strength H? I know that H = NI/L for a solenoid and I'm wondering if there is any condensed unit or if it is just ampere turns per meter.

Hi guys, Suppose I have a point O in the centre of the square (of side length X), where the top 2 corners of the square carries a positive charge each and the bottom left corner a negative charge and the bottom right corner a positive charge, what would the magnitude and direction of the...

Another poster is looking for a 20T magnetic field or better, so I went looking for what has been reported as the maximum field strength for an SC magnetic field to date. However I found some contradicting claims. Is there a refereeing organization or a reputable source from which to...

From the radius (1740 km) and mass (7.36 X 10^22 kg) of the moon, calculate gravitational field strength for this body. g = F/m = F/(7.36X10^22 kg) F = GmM/r^2 = (6.67X10^-11)(7.36X10^22)M/(1740X10^3)^2 What is the big M?

After a certain external field strength can it collapse?

The maximum theoretical field strength for a neutron star, and therefore for any known phenomenon is 1013 T. Why is there a maximum?

Alright everyone, normally I am prett good with electrostatics, butlately...I've been in a serious rut. My physics professor has asked us to varify the electric field at a distance r from a cylindrical gaussian surface, under three conditions. 1) with a constant chrage density, 2) with a...

Here is my solution. I completed this problem to the best of my ability and I am asking for someone to check and correct my solution if possible. I am not sure if my answers are correct, although and my thinking might also be flawed :confused: q1= 6.0e-6C q2= 1.5e-6C q3=-2.0e-6C The...

Hey! I've got my A-Level Physics exam on Thursday, and I'm just doing some past papers and I'm totally confused! Please help! One of the questions (multiple choice) was saying which statement was incorrect. The answer was: Electric potential is zero whenever electric field strength is...

Q: "The Earths radius is 6700km. Show that the magnitude of the gravitational field strength at a height of 350km above the Earth's surface is about 9 N/kg" I got the mass of the Earth which is 5.98E 24 G the constant = 6.67E -11 Formula : g= GM/r² , i can't seem to get 9, am I supposed...

I have racked my brain for the past two hours and I can't figure this out. If anyone can help me with, please do. Two long parallel wires 6.00 cm apart carry 19.5 A currents in the same direction. Determine the magnetic field strength at a point 12.0 cm from one wire and 13.4 cm from the...

What is the electric field strength in a region where the flux through a: 1.0cm \times 1.0cm flat surface is: 65N\frac{m^2}{C}, if the field is uniform and the surface is at right angles to the field? [] []----> E [] Since the field points at a right angle to the surface we have a norm...

I need help with the following question. A diopole is made up of two charges, Q1 and Q2, that are separated by a distance of 1 meter. Q1 has a charge of +3C and Q2 has a charge of -3C. What is the electric field strength of the field set up by these two charges at a point exactly halfway...

What is the electric field strength at a point in space where a proton experiences an acceleration of 1 million "g"? I'm completely lost on this one I know it's bound to be something simple but I just can't figure out where to start with it, well other than that 1 million "g" should be...

I'm kinda stuck on this question: 1. Calculate the magnitude ofthe magnetic f ield at a point midway between two long, parallel wires that are 1 .0 m apar t and have currents of1 0.0 A and 20.0 A, respectively, ifthe currents are (a) in opposite directions and (b) in the same direction...

I am stuck on my physics homework. I can manage the latter question, how ever when i work out the first one my working out has no rhyme nor reason (nor a right answer). Any help will be great. A small metal sphere on an insulating rod is placed on a top pan balance, as shown in the diagram...

Given are two charges +1 X 10^-6 and one 3 X 10 ^ -6 distnace of 10 cm apart I know there is a poitn in between these two and it is 4 cm from the 1.0 X 10^-6 charge But i am asked to plot the elctric field strength as a function if the elctric field is pointing right, then positive...

What is the difference between the meanings of the terms magnetic induction and magnetic field strength? thanks in advance...

am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?

i am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?