59 Answered Questions for the topic electromagnetism

Electromagnetism Math Science Physics

03/29/22

#### Would this be the correct formula?

If an experiment required you to measure the emf in a solenoid by changing : The number of magnets the distance between the solenoid and the magnet the relative motion or velocity Would the... more
Electromagnetism Physics Ap Physics

03/27/22

#### Can constant (not changing) electric field produce constant (not changing) magnetic field

It is known that a changing electric field will produce a changing magnetic field and vice versa.Is it the same with an electrostatic field? Or with the constant magnetic field?Also, I've read that... more
Electromagnetism Physics

03/13/22

#### Find the potential difference between Q and -Q at a distance of 4 m and the velocity of a point charge from point A to B.

Two charges, Q and -Q, are held stationary at a distance of 4 m. Q= 5x10^-6 is given. a) What is the potential difference VB-VA? b) A point charge of mass 0.3 g and charge 2x10^-6 C, initially at... more
Electromagnetism Physics

03/04/22

#### Find the volume charge density of a non-conducting sphere of radius 10 cm and the electric field at 20 cm from the center.

A non-conducting sphere of radius 10 cm carries a charge of uniformly distributed throughout its volume. At 5 cm from the centre of the sphere, the electric field is 2000 N/C and its orientation... more
Electromagnetism Physics

03/02/22

#### Find the surface density of a charge on a conductive sphere of radius 10 cm with an electric field of 1800 N/C.

At 12 cm in the radial direction from a conductive sphere of radius 10 cm, the electric field is 1800 N/C and its orientation points towards the interior of the sphere. Find the surface density of... more
Electromagnetism Physics

03/01/22

#### Find the resulting electric field at 7 cm and 10 cm from the center of a sphere having two shells.

Two thin, spherical, concentric metal shells have a radius of 6 cm and 8 cm. The inner shell carries a charge of 7 nC and the outer shell carries a charge of 4 nC. Find the resulting electric field... more
Electromagnetism Physics

02/16/22

#### What is the resultant electric force acting on a charge of 5 uc located at the point (3m,4m)?

We assume the existence of a uniform electric field E= 500 i N/C without specifying which charges are the source. To this field is added that of a point charge of 2 uc located at the origin. What... more
Electromagnetism Physics

02/16/22

#### A positive point charge q1 at the origin and a negative charge q2 at x=2m. The resultant electric field is 10.8 i N/C at x=1m and -8 i N/C at x=3m. Find q1 and q2.

A positive point charge q1 at the origin and a negative charge q2 at x=2m. The resultant electric field is 10.8 i N/C at x=1m and -8 i N/C at x=3m. Find q1 and q2.
Electromagnetism Physics

02/15/22

#### Find the vertical electric field between two horizontal plates

An electron penetrates the region between two uniformly charged horizontal plates, but oppositely signed. Its initial speed, at half distance between the plates is 2×10 ^6 i m/s. The plates have a... more
Electromagnetism Physics

01/26/22

#### Find the electrical charges of q1 and q2 with force of 10 N.

Two identical small metal spheres 3 cm apart attract each other with an electrical force of 150 N. They are temporarily connected by a conducting wire, which is then removed.Determine the initial... more
Electromagnetism Physics

01/26/22

#### Find charges of q2 and q3 on an equilateral triangle with known electric forces.

Three point charges q1, q2 and q3 are located at the corners of an equilateral triangle with sides of 10 cm. The electrical forces between them are F12= 5.4 N (attractive), F13= 15 N (repulsive)... more
Electromagnetism Physics

01/25/22

#### I need help with this

1.) A machine weighing 10,000 newtons was pulled up an incline 50 m long and 5.0 m high if the force used to overcome is 400 newtons.a.) What is the work input?b.) What is the work output?c.) What... more
Electromagnetism Physics Gauss

12/05/21

#### Why is the electric intensity equal to charge density over 2*epsilon?

Why is the electric intensity for a positive sheet of infinite extent given by:Consider a sheet of infinite extent.To find electric intensity at a point P from the sheet.Imagine a Guassian surface... more
Electromagnetism Physics Electrical Engineering

11/21/21

#### Is it possible, after increasing semiconductors‘ temperature, to make their conductivity be equal to the conductivity that of metals

Is it possible, after increasing semiconductors‘ temperature, to make their conductivity be equal to the conductivity that of metals. Why?
Electromagnetism Science Physics Physical Science

09/19/21

You are given six resistors each of value 10 ohms, how will you connect them to give a total of 10 ohms? I need this to draw a circuit diagram of this arrangement but am unable to figure it out.
Electromagnetism Physics Electrical Engineering

09/13/21

#### Finding the resistance value and total

Two incandescence 50w-220v connected in series, then the two lamps are connected in parallel with incandescent lamp an 80W, 220VA ) how the obstacles total?B ) how power produced all the joint if... more
Electromagnetism Physics

09/02/21

#### Electromagnetism question

This problem is in part an exercise in unit conversion. Silver is the element with the highest electrical conductivity. Wikipedia’s silver entry gives the density of silver to be 10.49 g/cm3 and... more
Electromagnetism Physics Electrical Engineering

08/08/21

#### Electromagnetism

Show that for a vector field that has the form E = F(r) r̂, the rotational is zero and the divergent is given by DIV(E) = 2F(r) ⁄ r + dF⁄dr
Electromagnetism Physics Electrical Engineering

08/08/21

#### Electromagnetism

A ring of radius R has a homogeneous charge distribution. Place the origin at the center of the ring and calculate the electrostatic field for any point r such that |r| < R.

06/18/21

#### are alpha particles going to ruin bumper carts? Making them unsafe.

Bumper cars are powered by a charged ceiling and floor. A pole on the bumper car connects these two charged surfaces to give the car current to run. The difference in voltage between the plates is... more
Electromagnetism Physics

06/17/21

#### are bumper cars safe?

Bumper cars are powered by a charged ceiling and floor. A pole on the bumper car connects these two charged surfaces to give the car current to run. The difference in voltage between the plates is... more
Electromagnetism Physics Electrical Engineering

05/14/21

#### Power and coil rotation

Suppose that there is a single generator providing power to your house. Right now, the wire coil is spinning at a certain number of rpms within a magnetic field, generating current via Faraday's... more
Electromagnetism Chemistry Physics

04/15/21

#### Photon to break C=C bond

The C= C bond is very strong with a large bond energy of 962 kJ/mol. Calculate the frequency of the photon required to break this bond. Calculate the wavelength of the photon required to break a... more

03/13/21

#### Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...

Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...a.) 1 A/sb.) 1 mA / msc.) 2 mA / 10 μs
Electromagnetism Math Science Physics

03/13/21

#### Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...

Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...a.) 1 A/sb.) 1 mA / msc.) 2 mA / 10 μs

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