Recent questions in Electromagnetism

ElectromagnetismAnswered question

Camsassophy71s 2023-02-12

What is a magnetic field? How can the direction of magnetic field lines at a place be determined ?

ElectromagnetismAnswered question

mpifanahhf 2023-02-09

In an electromagnetic wave, the amplitude of electric field is 1 V/m. the frequency of wave is $5\times {10}^{14}Hz$. The wave is propagating along z-axis. The average energy density of electric field, in Joulem, will be?

ElectromagnetismAnswered question

jordancuzwb 2023-02-05

How will separate a mixture of iron filling and sand

ElectromagnetismAnswered question

Chana Rivera 2023-02-03

Which of the following can produce electromagnetic waves?

A charge moving with uniform acceleration.

A charge moving with uniform retardation.

An oscillating charge.

All of the above

A charge moving with uniform acceleration.

A charge moving with uniform retardation.

An oscillating charge.

All of the above

ElectromagnetismAnswered question

Neuwiedlq8 2023-02-01

A bar magnet has a magnetic moment of one joule per tesla. We need an external torque of 3 Nm to hold a bar magnet that makes 30 degrees with the field. Find the work required to turn it by further 90 degrees.

A) 6.3 J

B) 8.1 J

C) 4.9 J

D) 19.5 J

A) 6.3 J

B) 8.1 J

C) 4.9 J

D) 19.5 J

ElectromagnetismAnswered question

Brendan Nunez 2023-01-28

An uncharged insulator can be charged by induction. True or False

ElectromagnetismAnswered question

mriswith170wp 2023-01-28

A charged particle enters a uniform magnetic field with velocity vector at an angle of ${45}^{\circ}$ with the magnetic field. The pitch of the helical path followed by the particle is p. The radius of the helix will be

A) $\frac{p}{\sqrt{2}\pi}$

B) $\sqrt{2}p$

C) $\frac{p}{2\pi}$

D) $\frac{\sqrt{2}p}{\pi}$

A) $\frac{p}{\sqrt{2}\pi}$

B) $\sqrt{2}p$

C) $\frac{p}{2\pi}$

D) $\frac{\sqrt{2}p}{\pi}$

ElectromagnetismAnswered question

ikalawangq00 2023-01-26

Electromagnets are used in cranes to pick heavy metallic objects.

A)True

B)False

A)True

B)False

ElectromagnetismAnswered question

Jesse Freeman 2023-01-19

Magnetic field lines start from North pole and end at South pole.

True or False

True or False

ElectromagnetismAnswered question

mierekaslq 2023-01-14

Why can only electrons move and get transferred? Why not protons?

ElectromagnetismAnswered question

Keely Rivers 2023-01-14

The electric field of a radio wave is given by $\overrightarrow{E}={E}_{0}\mathrm{sin}(kz-\omega t)(\hat{i}+\hat{j})$. Give a unit vector in the direction of the magnetic field at a place and time where $\mathrm{sin}(kz-\omega t)$ is positive.

ElectromagnetismAnswered question

Draven Crane 2023-01-10

A copper wire of diameter 1.6 mm carries a current of 20 A. Find the maximum magnitude of the magnetic field $\overrightarrow{B}$ due to this current.

ElectromagnetismAnswered question

Audrina Graham 2023-01-09

On what factors does the magnitude of induced EMF in a coil depends?

ElectromagnetismAnswered question

Fabian Atkins 2023-01-01

Why is soft iron used as the core of the electromagnet in an electric bell?

ElectromagnetismAnswered question

Bentley Doyle 2023-01-01

State a law which determines the direction of magnetic field around a current carrying wire.

ElectromagnetismAnswered question

Damon Turner 2022-12-30

In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by $k^$ and $2i^-2j^$, respectively. What is the unit vector along the wave's propagation direction?

A) $\frac{1}{2}\left(i^+j^\right)$

B) $\frac{1}{5}\left(2i^+j^\right)$

C)$\frac{1}{5}\left(i^+2j^\right)$

D) $\frac{1}{2}\left(j^+k^\right)$

A) $\frac{1}{2}\left(i^+j^\right)$

B) $\frac{1}{5}\left(2i^+j^\right)$

C)$\frac{1}{5}\left(i^+2j^\right)$

D) $\frac{1}{2}\left(j^+k^\right)$

ElectromagnetismAnswered question

Audrina Graham 2022-12-28

An electromagnetic wave has an electric field given by the expression (in Cartesian co-ordinates) : $\overrightarrow{E}(x,t)=6.0\mathrm{cos}(1.4\times {10}^{7}x-3.43\times {10}^{15}t)\hat{z}$. What is the direction of the magnetic field at time t = 0 and position x = 0 ?

A. -x

B. +x

C. -y

D. +y

A. -x

B. +x

C. -y

D. +y

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.