Recent questions in Electromagnetism

ElectromagnetismAnswered question

merodavandOU 2022-11-27

Which part of the bar magnet exerts the strongest force?

Only north pole

Both the poles

Middle part

Only south pole

Only north pole

Both the poles

Middle part

Only south pole

ElectromagnetismAnswered question

cdcamandokwd 2022-11-26

Dear PlainMath, pls help me to find answer

Emission of light from an atom occurs when the electron:

Emission of light from an atom occurs when the electron:

ElectromagnetismAnswered question

vegetatzz8s 2022-11-26

The magnetic field around a magnet is the strongest at which points? At the centre At the poles At the sides Same throughout

ElectromagnetismAnswered question

agrarismoN07 2022-11-26

The strength of an electromagnet cannot be increased by

increasing current in the coil.

increasing the number of turns in the coil.

reversing polarity of the battery.

using core of larger cross-section.

increasing current in the coil.

increasing the number of turns in the coil.

reversing polarity of the battery.

using core of larger cross-section.

ElectromagnetismAnswered question

NormmodulxEE 2022-11-25

Which one of the following statements is/are correct?br>Abr>Formula can be written by balancing the valencies of the different atoms.br>Bbr>Formula can be written by reducing the valencies of different atoms.br>Cbr>Formula are not affected by the presence of valencies.br>Dbr>Formula can be written by adding the valencies of different atoms.

ElectromagnetismAnswered question

vegetatzz8s 2022-11-25

The magnitude of the kinetic energy of a body is ‘k’. If its speed doubles, what is its kinetic energy?

ElectromagnetismAnswered question

neimanjaLrq 2022-11-24

Solve the recurrence relation by taking the logarithm of both sides and making the substitution ${b}_{n}=\mathrm{lg}{a}_{n}$

Solve this recurrence relation:

${a}_{n}={\left(\frac{{a}_{n-2}}{{a}_{n-1}}\right)}^{\frac{1}{2}}$

by taking the logarithm of both sides and making the substitution

${b}_{n}=\mathrm{lg}{a}_{n}$

A couple years ago I took precalc and a couple years before that I took College Algebra to brush up since before then I'd been out of school for a couple of years already. So I'm extremely rusty and this first step, getting the logarithm of both sides, has me confused enough... Like how would I even get the logarithm of the left side?? and then what exactly is that "substitution" supposed to be substituting?

So log'ing both sides I get

$\mathrm{ln}({a}_{n})=\frac{1}{2}\mathrm{ln}({a}_{n-2})-\frac{1}{2}\mathrm{ln}({a}_{n-1})$

Solve this recurrence relation:

${a}_{n}={\left(\frac{{a}_{n-2}}{{a}_{n-1}}\right)}^{\frac{1}{2}}$

by taking the logarithm of both sides and making the substitution

${b}_{n}=\mathrm{lg}{a}_{n}$

A couple years ago I took precalc and a couple years before that I took College Algebra to brush up since before then I'd been out of school for a couple of years already. So I'm extremely rusty and this first step, getting the logarithm of both sides, has me confused enough... Like how would I even get the logarithm of the left side?? and then what exactly is that "substitution" supposed to be substituting?

So log'ing both sides I get

$\mathrm{ln}({a}_{n})=\frac{1}{2}\mathrm{ln}({a}_{n-2})-\frac{1}{2}\mathrm{ln}({a}_{n-1})$

ElectromagnetismAnswered question

Brandon White 2022-11-24

A coil has N turns enclosing an area of A. In a physics laboratory experiment, the coil is rotated during the time interval Δt from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the field. The magnitude of Earth's magnetic field at the lab location is B.a: What is the magnitude Φinitial of the magnetic flux through one turn of the coil before it is rotated?b: What is the magnitude Φfinal of the magnetic flux through one turn of the coil after it is rotated?c: What is the magnitude of the average emf induced in the entire coil?

ElectromagnetismAnswered question

Adriel Vance 2022-11-24

The magnetic field inside a long straight solenoid-carrying current

is zero

decreases as we move towards its end

increases as we move towards its end

is the same at all points

is zero

decreases as we move towards its end

increases as we move towards its end

is the same at all points

ElectromagnetismAnswered question

Jadiel Yates 2022-11-24

"At the junkyard, an electromagnet holds a 1 ton car freely in the air (no acceleration exc. gravity). Assuming 100% power efficiency, how many Watt electrical power are needed?" - I know that the magnet produces 10,000 N, but in order to get the 𝑊, I'd need some velocity (W = Nm/s), and I don't see any m/s?

ElectromagnetismAnswered question

smekkinnZuG 2022-11-24

What are the similarities and differences between gravitational, electromagnetic and magnetic force?

ElectromagnetismAnswered question

lascieflYr 2022-11-23

What coil position in the magnetic field creates the highest emf?

ElectromagnetismAnswered question

intrigahQNn 2022-11-23

What is an electron? State its relative mass and charge.

ElectromagnetismAnswered question

Hanna Webster 2022-11-20

What could be some applications for a highly compressed magnetic field?

If you had a powerful electromagnet in the shape of a hollow sphere in which the top and bottom halves are the opposing poles, what can the magnetic filed at the center of the sphere be used for?

If you had a powerful electromagnet in the shape of a hollow sphere in which the top and bottom halves are the opposing poles, what can the magnetic filed at the center of the sphere be used for?

ElectromagnetismAnswered question

Rigoberto Drake 2022-11-18

A straight wire has 8 A current in the -y-direction. The magnetic field is produced due to the current in the wire in addition to this a uniform magnetic field B₀ with magnitude 1.5e-6 T is in the +x-direction.

a) In the xz plane, find the magnitude of the magnetic field at the point $x=0,\text{}z=1.00\text{}m$

b) Give its direction.

c) In the xz plane, find the magnitude of the magnetic field at the point $x=1.00\text{}m,\text{}z=0$

d) Give its direction.

e) In the xz plane, find the magnitude of the magnetic field at the point $x=0,\text{}z=-0.25\text{}m$

a) In the xz plane, find the magnitude of the magnetic field at the point $x=0,\text{}z=1.00\text{}m$

b) Give its direction.

c) In the xz plane, find the magnitude of the magnetic field at the point $x=1.00\text{}m,\text{}z=0$

d) Give its direction.

e) In the xz plane, find the magnitude of the magnetic field at the point $x=0,\text{}z=-0.25\text{}m$

Electromagnetism Physics belongs to those aspects of the science that can be applied to anything from engineering to design and construction of automation for our daily life. Since we are dealing with the relations between electricity and magnetism, finding answers and questions that we present will help you to see practical examples like radio, gamma rays, or microwave emissions. Take at least one electromagnetism example and you will be able to repeat the steps or receive relevant help. Make sure to focus on the experiments and the order of the steps to gain even more clarity as you study electromagnetism.