All categories

3 years ago

In the general world view of magnetism, magnetic fields arise from : stationary color charges

Physics

1 answer:

Paladinen [302]3 years ago

6 0

Answer:

The correct option is "moving electric charges or currents".

Explanation:

Magnetic field is used to define as a field that surrounds a current carrying conductor or moving electric charge by virtue of which it exerts a force on another current carrying conductor or a moving charge itself.

The magnetic field generated by a moving charge is given by

$B=\frac{\mu _{o}q}{4\pi }\times \frac{v\times r}{|r|^{3}}$

where

q = is the magnitude of charge

v = is the velocity vector of the moving charge

r = is the position vector of the point at which the field is calculated

|r| = is the magnitude of position vector.

Similar the magnetic field generated by a current carrying conductor is given by

$B=\frac{\mu _{o}I}{4\pi }\times \int \frac{dl\times r}{|r|^{2}}$

where

I is the current

The integration is carried out along the whole length of conductor.

Also since magnetic mono poles do not exist or their existence is not confirmed until now so it is not an appropriate option.

You might be interested in

PLEASE HELP ME I AM TIMED!

grigory [225]

Answer:

conditions have changed significantly

Explanation:

7 0

3 years ago

PLEASEE HELP!!!!!!Why are the youth not getting involved in their communities and voting? How is media influencing the voters?

Lelu [443]

Answer:

because they are underaged and prob dont care and also the gov thinks that the youth cant make a reasonable decision for them selves for sum like that and the media influnces them to by saying whats going on and who supports who

6 0

3 years ago

Why is it important to always subtract the earlier value from the later value when finding the change in mass,instead of always

Artist 52 [7]

Mass and energy are inter convertible.As per Einsteins mass and energy relations i.e $E=Mc^2$ ,some amount of energy is lost that is converted into energy .

In our day to day life ,generally mass is lost and energy is formed. In a ideal assumption we subtract the mass of earlier one from the later one which indirectly denotes that some amount of mass is lost and energy is released .There is also endothermic reactions where energy is needed which does not mean mass is added.Here simply energy is needed to initiate the reactions.

So instead of subtracting the smaller value from lager we subtract the initial value from final as the latter one can explain a physical phenomenon in a better way.we can get some in formation from it.

3 0

3 years ago

If we use 1 millimeter to represent 1 light-year, how large in diameter is the Milky Way Galaxy?

postnew [5]

Answer:

if 1 light year was one millimeter then 105,700 light years = 105,700 mm, (or 105.7 meters in case you needed to simplify or something)

3 0

3 years ago

Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the

balandron [24]

Answer:

a) Δx = 11.6 m

b) t = 3.9 s

Explanation:

Since the snowmobile is moving at constant speed, and the drive force is 195 N, this means that thereis another force equal and opposite acting on it, according to Newton's 2nd Law, due to there is no acceleration present in the horizontal direction .
This force is just the force of kinetic friction, and is equal to -195 N (assuming the positive direction as the direction of the movement).
Once the drive force is shut off, the only force acting on the snowmobile remains the friction force.
According Newton's 2nd Law, this force is causing a negative acceleration (actually slowing down the snowmobile) that can be found as follows:

$a = \frac{F_{fr} }{m} = \frac{-195N}{128kg} = -1.5 m/s2 (1)$

Assuming the friction force keeps constant, we can use the following kinematic equation in order to find the distance traveled under this acceleration before coming to an stop, as follows:

$v_{f} ^{2} -v_{o} ^{2} = 2* a* \Delta x (2)$

Taking into account that vf=0, replacing by the given (v₀) and a from (1), we can solve for Δx, as follows:

$\Delta x =- \frac{v_{o}^{2}}{2*a} =- \frac{(5.90m/s)^{2}}{2*(-1.5m/s2)} = 11.6 m (3)$

We can find the time needed to come to an stop, applying the definition of acceleration, as follows:

$v_{f} = v_{o} + a*\Delta t (4)$

Since we have already said that the snowmobile comes to an stop, this means that vf = 0.
Replacing a and v₀ as we did in (3), we can solve for Δt as follows:

$\Delta t = \frac{-v_{o} }{a} = \frac{-5.9m/s}{-1.5m/s2} = 3.9 s (5)$

7 0

3 years ago