1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DerKrebs [107]
3 years ago
10

What is an advantage of using an electromagnet rather than a regular magnet

Physics
2 answers:
Lena [83]3 years ago
5 0
Electromagnet would have a stronger pull than a regular magnet
<span />
SVEN [57.7K]3 years ago
4 0

Answer:

Electromagnets are temporary magnets made by supplying electric current to a soft iron wounded with coils of wire. Once the source of electricity is disconnected, the magnetism dies off.

However electromagnets usually have stronger electric fields than regular magnets, therefore they are often used in lifting large piece of equipment from one point to another, provided that the equipment are magnetic in nature.

Another major advantage of using an electromagnet rather than a regular magnet is that the magnetism of the electromagnet can be terminated when need be by simply disconnecting the source of electricity.

For example in lifting a heavy metal from one point to another if it gets to the point of dropping off the metal there will be a need to terminate the magnetism so that the metal can fall off; a regular magnet can not be used for this purpose.

You might be interested in
Ethan moves a 100 kg barrel up a 50 meter ramp. The amount of work Ethan has completed is:
Zinaida [17]

Answer:

I think C. 150 Joules

Explanation:

4 0
3 years ago
Read 2 more answers
A long thin uniform rod of length 1.50 m is to be suspended from a frictionless pivot located at some point along the rod so tha
Dvinal [7]

Answer:

0.087 m

Explanation:

Length of the rod, L = 1.5 m

Let the mass of the rod is m and d is the distance between the pivot point and the centre of mass.

time period, T = 3  s

the formula for the time period of the pendulum is given by

T = 2\pi \sqrt{\frac{I}{mgd}}    .... (1)

where, I is the moment of inertia of the rod about the pivot point and g is the acceleration due to gravity.

Moment of inertia of the rod about the centre of mass, Ic = mL²/12

By using the parallel axis theorem, the moment of inertia of the rod about the pivot is

I = Ic + md²

I = \frac{mL^{2}}{12}+ md^{2}

Substituting the values in equation (1)

3 = 2 \pi \sqrt{\frac{\frac{mL^{2}}{12}+ md^{2}}{mgd}}

9=4\pi^{2}\times \left ( \frac{\frac{L^{2}}{12}+d^{2}}{gd} \right )

12d² -26.84 d + 2.25 =  0

d=\frac{26.84\pm \sqrt{26.84^{2}-4\times 12\times 2.25}}{24}

d=\frac{26.84\pm 24.75}{24}

d = 2.15 m , 0.087 m

d cannot be more than L/2, so the value of d is 0.087 m.

Thus, the distance between the pivot and the centre of mass of the rod is 0.087 m.

3 0
3 years ago
A child on a tricycle is moving at a speed of 1.40 m/s at the start of a 2.25 m high and 12.4 m long incline. The total mass is
goblinko [34]

Answer:

The work done by the child as the tricycle travels down the incline is 416.96 J

Explanation:

Given;

initial velocity of the child, v_i = 1.4 m/s

final velocity of the child, v_f = 6.5 m/s

initial height of the inclined plane, h = 2.25 m

length of the inclined plane, L = 12.4 m

total mass, m = 48 kg

frictional force, f_k = 41 N

The work done by the child is calculated as;

\Delta E_{mech} = W - f_{k} \Delta L\\\\W = \Delta E_{mech}  + f_{k} \Delta L\\\\W = (K.E_f - K.E_i) + (P.E_f - P.E_i) + f_{k} \Delta L\\\\W = \frac{1}{2} m(v_f^2 - v_i^2) + mg(h_f - h_i) + f_{k} \Delta L\\\\W = \frac{1}{2} \times 48(6.5^2 - 1.4^2) + 48\times 9.8(0-2.25) + (41\times 12.4)\\\\W = 966.96  \ - \ 1058.4 \ + \ 508.4\\\\W = 416.96 \ J

Therefore, the work done by the child as the tricycle travels down the incline is 416.96 J

5 0
3 years ago
A plane has a cruising speed of 250 miles per hour when there is no wind. at this speed, the plane flew 300 miles with the wind
kherson [118]
The answer to your question is 50 miles per hour
4 0
3 years ago
Three metal spoons are on a table. They are each at room temperature. If the three spoons touch.
hoa [83]
If the three spoon touch nothing happens because they are all at room Temperature
3 0
2 years ago
Read 2 more answers
Other questions:
  • What is electropositivity and electronegativity? Between group 1 and group 17, which is electropositive and electronegative?
    9·1 answer
  • A wheel with moment of inertia 25 kg. m2 and angular velocity 10 rad/s begins to speed up, with angular acceleration 15 rad/sec2
    5·1 answer
  • A dart is loaded into a spring-loaded toy dart gun by pushing the spring in by a 
distance d. For the next loading?the spring is
    7·1 answer
  • 1)After catching the ball, Sarah throws it back to Julie. However, Sarah throws it too hard so it is over Julie's head when it r
    9·1 answer
  • The index of refraction of light varies from color to color. True or False?
    8·1 answer
  • A tire sits atop a ramp. When the tire is released, it rolls down the ramp. At the ramp's bottom, the speeding tire knocks down
    13·1 answer
  • Solve the inequality 2(n+3) – 4&lt;6. Then graph<br> the solution.
    14·1 answer
  • Please write in 4-6 sentences
    7·1 answer
  • Hey, guys I kinda need help with this question, 1. The number of atoms of each element are not equal on both sides of the equati
    14·2 answers
  • When is the force on a current-carrying wire in a magnetic field at its strongest?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!