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cricket20 [7]
3 years ago
14

The magnetic field of a bar magnet is the strongest ___.

Physics
2 answers:
AnnyKZ [126]3 years ago
5 0
B) at the poles of the magnet
ivanzaharov [21]3 years ago
4 0

The magnetic field is strongest at the part where the magnetic field lines are more, which is at the poles.

Answer : Option B

<u> Explanation: </u>

The strength of magnetic field is strongest in a bar magnet at either of the poles. The polarity is established by the magnetic field lines and they are in abundance at the poles too.

Therefore, they are strongest at the poles. The center of the magnet has the weakest strength of the magnetic field which decreases from either side of the poles towards the center.

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Maslowich

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3 0
4 years ago
Fermi energy of conduction electrons in silver is 0.548 J. Calculate the number of such electrons in unit cm3
ICE Princess25 [194]

Answer:

n=1.86*10^{-30}m^3

Explanation:

From the question we are told that:

Fermi energy of conduction electrons E_f=0.548J

Generally the equation for Fermi energy is mathematically given by

 E_f=\frac{3}{\pi}^2/3*\frac{h^2}{8m}*{n^{2/3}}

 E_f=\frac{3}{\pi}^2/3*\frac{h^2}{8m}*{n^{2/3}}

 {n^{2/3}}=\frac{E_f}{\frac{3}{\pi}^2/3*\frac{h^2}{8m}}

Where

h= Planck's constant

 {n^{2/3}}=\frac{E_f}{\frac{3}{\pi}^2/3*\frac{h^2}{8m}}

 {n^{2/3}}=\frac{0.548J}{3.62*10^{-19}}

 n=(1.51*10^{-20})^{3/2}

 n=1.86*10^{-30}m^3

3 0
3 years ago
The ability to distinguish between acceleration and velocity will be critical to your understanding of many other concepts in th
Sauron [17]

Answer:

Object could only be moving with increasing speed.

Explanation:

Let us consider the general formula of acceleration:

a = (Vf - Vi)/t

Vf = Vi + at   -------- equation 1

where,

Vf = Final Velocity

Vi = Initial Velocity

a = acceleration

t = time

<u>FOR POSITIVE ACCELERATION:</u>

Vf = Vi + at

since, both acceleration and time are positive quantities. Hence, it means that the final velocity of the object shall be greater than the initial velocity of the object.

Vf > Vi

It clearly shows that if an object moves with positive acceleration. <u>It could only be moving with increasing speed.</u>

Solving the same equation for negative acceleration shows that the final velocity will be less than initial velocity and object will be moving with decreasing speed.

And for the constant velocity final and initial velocities are equal and thus, acceleration will be zero.

7 0
3 years ago
Which of the following are used in an electrochemical cell?
yanalaym [24]

Answer:

B please give me brainlyest

Explanation:

6 0
3 years ago
A bowling ball with a mass of 9 kg is moving at a speed of 4 m/s. What is its
Ilia_Sergeevich [38]
I’m pretty sure it’s B
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