23.02.2020

If we want to increase the strength of an electromagnet, which two of these things can we do

. 4

Faq

Biology
Step-by-step answer
P Answered by PhD

1st Qn) 1st option, the magnetic force of a magnet can act at a distance.

magnetism cannot be induced on the paper since paper is a non-magnetic material. In fact, the magnetic field can pass through the paper.

Gravity cannot attract the magnet to the door. Gravity only pulls things down towards the earth.

Magnetism does not involve the movement of atoms.

Q5) 3rd option, the iron filings lining up with the magnetic field lines

I've attached the diagram of how the iron filings look.

Note that although the filings are mostly concentrated at the poles of the magnets, they do not only accumulate there. Most of them are there as magnetic fields are stronger near the poles of the magnet.

Q8) 1st option, the magnetic attraction will decrease.

Q8) 1st option, the magnetic attraction will decrease.Q10) 1st option, wrap more coils around the nail.

Q8) 1st option, the magnetic attraction will decrease.Q10) 1st option, wrap more coils around the nail.Q11) 4th option, how the size of the magnet affects the strength of its magnetic pull on objects.

He used the same paper clip so he cannot be testing how the type of paper clip affects the way in which it reacts to the force of a magnet. For the same reason, option 3 I wrong too.

Q12) 2nd option, measure how close each magnet can get to a metal object before picking it up.

The mass of a magnet does not show its magnetic field strength.

4th option is simply measuring the volume of the magnets.


A magnet can hold a piece of paper to the door of a refrigerator. How does the magnet stick without
Biology
Step-by-step answer
P Answered by PhD

1st Qn) 1st option, the magnetic force of a magnet can act at a distance.

magnetism cannot be induced on the paper since paper is a non-magnetic material. In fact, the magnetic field can pass through the paper.

Gravity cannot attract the magnet to the door. Gravity only pulls things down towards the earth.

Magnetism does not involve the movement of atoms.

Q5) 3rd option, the iron filings lining up with the magnetic field lines

I've attached the diagram of how the iron filings look.

Note that although the filings are mostly concentrated at the poles of the magnets, they do not only accumulate there. Most of them are there as magnetic fields are stronger near the poles of the magnet.

Q8) 1st option, the magnetic attraction will decrease.

Q8) 1st option, the magnetic attraction will decrease.Q10) 1st option, wrap more coils around the nail.

Q8) 1st option, the magnetic attraction will decrease.Q10) 1st option, wrap more coils around the nail.Q11) 4th option, how the size of the magnet affects the strength of its magnetic pull on objects.

He used the same paper clip so he cannot be testing how the type of paper clip affects the way in which it reacts to the force of a magnet. For the same reason, option 3 I wrong too.

Q12) 2nd option, measure how close each magnet can get to a metal object before picking it up.

The mass of a magnet does not show its magnetic field strength.

4th option is simply measuring the volume of the magnets.


A magnet can hold a piece of paper to the door of a refrigerator. How does the magnet stick without
Physics
Step-by-step answer
P Answered by Master
An electromagnet is a type of magnet in which the magnetic field is produced using the current. The simplest form of an electromagnet is a wire wrapped around in a coil.
The strength of magnetic field of such magnet is given with this equation:
B=\frac{NI\mu}{L}
Where N is the number of loops in the coil, I is the strength of the current flowing through the coil, L is the length of the coil, and \mu is permeability of the electromagnet core material.
From this equation, we can see that increasing both the current and number of loops will increase the strength of the magnet.
Both BLANKS should be Increase. When you use the additional battery you will have more voltage and more voltage means more electricity.
Physics
Step-by-step answer
P Answered by PhD

if he wants to increase the strength of his electromagnet, he must increase  the number of loops in the coil of wire along its length. If he uses an additional battery, the strength of his electromagnet will increase.

Explanation:

The equation that relates the variables in interest is:

B = μ*N*I/L

B = strength of the magnetic field

n = number of loops  in the coil of wire

I = current in the wire

μ =  magnetic permeability

L = length of coil of wire

Then, if the number of loops  increases, the strength of the electromagnet also increase.

An additional battery will cause an increment of the current in the wire , and therefore an increment of the strength of the electromagnet.

Physics
Step-by-step answer
P Answered by Specialist
An electromagnet is a type of magnet in which the magnetic field is produced using the current. The simplest form of an electromagnet is a wire wrapped around in a coil.
The strength of magnetic field of such magnet is given with this equation:
B=\frac{NI\mu}{L}
Where N is the number of loops in the coil, I is the strength of the current flowing through the coil, L is the length of the coil, and \mu is permeability of the electromagnet core material.
From this equation, we can see that increasing both the current and number of loops will increase the strength of the magnet.
Both BLANKS should be Increase. When you use the additional battery you will have more voltage and more voltage means more electricity.
Physics
Step-by-step answer
P Answered by Master

Answer : The correct answer for both the fill in the blank is, increases.

Explanation :

Formula used :

1) B=\mu_o\times \frac{N\times I}{L}

B = strength of magnetic filed

N = Number of loops

I = current in the wire

\mu_o =  magnetic permeability

B\propto N

The more the number of loops in the solenoid more will the strength of three magnetic fields.

2) Also according to Ohm's law:

Voltage is directly proportional to current:

V\propto I

With increase in voltage the the current will increase which in return increase the magnetic field in the solenoid.

So, the correct answer for both the fill in the blank is, increases.

Physics
Step-by-step answer
P Answered by PhD

The formula (there is one) that determines the strength of an electromagnet is

H = I*N/L

H is the strength

I is the current

N is the number of turns

L is the length.

Question One

As N goes up, so does the strength of the electromagnet. The formula tells you this. If he wants a stronger magnet, he must Increase the number of turns.

The resistance of the wire will likely stay the same when you don't add any more turns. So if you increase the voltage, you will increase the current. That means you get a stronger magnet.

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