Does more force mean more velocity?
It would be better to say a greater force causes a greater CHANGE in velocity for an object. In that particular case, a greater gravitational force means that the planet must have a circular orbit with a greater speed.
Why does force decrease as velocity increases?
The force generated by a muscle is a function of its velocity. Because it takes a finite amount of time for cross-bridges to attach, as filaments slide past one another faster and faster (i.e., as the muscle shortens with increasing velocity), force decreases due to the lower number of cross-bridges attached.
When Lorentz force is maximum and minimum?
There is no force when ϕ = 0 or 180°, both of which correspond to a current along a direction parallel to the field. The force is at a maximum when the current and field are perpendicular to each other. The force is given by dF= idl × B.
Is Lorentz force frame dependent?
The laws that govern electromagnetic phenomena are not invariant under Galilean Transformation, they are instead invariant under Lorentz transformation. However the combine effect of electric and magnetic fields (so also the Lorentz’s Force) is not frame dependent under Lorentz Transformation.
What does Lorentz law state?
Whenever a moving charged particle is in the presence of a magnetic and electric field the Lorentz force law tells us that the total force from these fields acting on the charged particle is equal to the sum of the electric and magnetic forces.
On what factors Lorentz force depends?
1. The strength (absolute value) of the magnetic component is proportional to four factors: the charge q of the particle, the speed v of the particle, the intensity B of the magnetic induction, and the sine of the angle between the vectors v and B.
Is current frame dependent?
Can we conclude that electric current is also a reference dependent quantity? yes. if a neutral configuration with nonzero currents is seen from an appropriate reference frame, then a net charge density will appear.
Is magnetic force frame dependent?
Yes, magnetic field is dependent on the frame of reference of the observer. Consider a magnetic field originated due to the motion of a charged particle. As the motion of any object is frame dependent, the velocity of the charged particle is dependent on the frame of reference.
Is electric field frame dependent?
We have chosen the simplest possible example to illustrate the basic point that electric and magnetic fields are frame-dependent concepts.
Is magnetic force depends on frame of reference?
The magnetic force depends on →v which depends on the inertial frame of reference. Thus the magnetic force is a velocity dependent. It differs from one inertial frame to another. The net acceleration arising due to magnetic force is independent from frame to frame for inertial frames of reference.
Which one of the following is correct statement about magnetic force?
Solution : As the action and reaction and instantaneous in IIIrd law. But magnetic force transmit with finite speed c.
Why is electric field frame dependent?
Since the magnetic effect of a charged particle is an effect that depends on the relative motion between the particle and the “medium,” the presence of a magnetic field (and its detection), is frame dependent!
What is the dependence between a magnetic force and a current?
Current is directly proportional to magnetic force for a straight current carrying conductor in a uniform magnetic field. So the force is directly proportional to the size of the current. If the current is doubled the force on the conductor will double.
How does the direction of current affects the magnetic force?
The magnetic field produced by an electric current is always oriented perpendicular to the direction of the current flow. Similar to the situation with electric field lines, the greater the number of lines (or the closer they are together) in an area the stronger the magnetic field.
Is the relationship between current and magnetic force linear?
As equation 3 illustrates, the magnetic field intensity is linearly related to the current. The force equation shows that the force-current relationship is linear for a given angle orientation between the field direction of the coil and field direction of the permanent magnet.
Are magnetic field and current directly proportional?
The strength of a magnetic field is directly proportional to the current flowing. Therefore, if an alternating current is flowing, a magnetic field around the conductor will be produced, that is in phase with the alternating current.
Is force directly proportional to magnetic field?
Magnetic force is directly proportional to the intensity of magnetic field or magnetic flux density. The direction of force will be perpendicular to the plane formed by B and V.
Is directly proportional to length of magnetic path?
In the first place, the value of the magnetic field at a point is directly proportional to both the value of the current in the conductor and the length of the current-carrying segment under consideration. In addition, the magnetic field at a point depends upon how far the point is from the current element.
What happens to magnetomotive force when reluctance increases?
Explanation: Reluctance is magnetomotive force per unit flux, So unit of reluctance = unit of MMF / unit of magnetic flux = A/Wb. Explanation: Reluctance is inversely proportional to the magnetic flux density, hence as magnetic flux density increases, reluctance decreases.