Right hand grip rule e=mc2andallthat

Then, point your indexfinger in the direction of vector a and your middle finger in the direction of vector b. Your right thumb will pointin the direction of the vector product, a x b (vector c). Normally, for an electromagnetic wave, the electric and magnetic fields, and the direction of propagation of the wave obey the right-hand rule. However, left-handed materials have special properties – the negative refractive index. It makes the direction of propagation point in the opposite direction. Fleming’s left hand rule is a rule for finding the direction of the thrust on a conductor carrying a current in a magnetic field.

Since the field lines are emerging from X, we can confidently assert that this is a north-seeking pole, while Y is a south-seeking pole. A current-carrying coil will create a magnetic field as shown below. This also tells us that magnetic monopoles (that is to say, isolated N and S poles) are impossible. Another way to demonstrate this is with the Electricity and Magnetism Light bulb demo. When there is alternating current, the wire vibrates, but when it is direct current we can apply force in a specific direction. Using your right hand, it is possible to predict the direction the current is flowing.

In this form, the fingers of the right hand are curled to match the curvature and direction of the motion or the magnetic field. When viewed at a position along the positive z-axis, the ¼ turn from the positive x- to the positive y-axis is counter-clockwise. The various right- and left-hand rules arise from the fact that the three axes of three-dimensional space have two possible orientations. This can be seen by holding your hands together with palms up and fingers curled. If the curl of the fingers represents a movement from the first or x-axis to the second or y-axis, then the third or z-axis can point along either right thumb or left thumb.

While a magnetic field can be induced by a current, a current can also be induced by a magnetic field. We can usethe second right hand rule, sometimes called the right hand grip rule, to determine the direction of the magneticfield created by a current. To use the right hand grip rule, point your right thumb in the direction of the current’sflow and curl your fingers. The direction of your fingers will mirror the curled direction of the induced magnetic field.

Effects of Forces

1. Using the right hand rule tells us that the magneticforce will point in the right direction.
2. It reveals a connection between the current and the magnetic field lines in the magnetic field that the current created.
3. A cross product, or vector product, is created when an ordered operation is performed on two vectors, a and b.
4. De Graaf’s translation of Fleming’s left-hand rule – which uses thrust, field and current – and the right-hand rule, is the FBI rule.
5. Your right thumb will pointin the direction of the vector product, a x b (vector c).

The direction of the current in the last diagram is shown using the ‘dot and cross’ convention which, by a strange coincidence, I have also written about before . To go in reverse order for no particular reason, I don’t like using the second method because it involves a tricky mental rotation of the plane of view by 90 degrees to imagine the current direction as viewed when looking directly at the ends of the magnet. A solenoid is an electromagnet made of a wire in the form of a spiral whose length is larger than its diameter. The hand rules work the same but they are based on two different current concepts. When choosing three vectors that must be at right angles to each other, there are two distinct solutions, so when expressing this idea in mathematics, one must remove the ambiguity of which solution is meant.

Right Hand Rule for Lenz’s Law

So we use the convention of the right hand to predict the direction of the fields relative to each other. If we consider current flow as the movement of positive charge carriers (conventional current) in the aboveimage, we notice that the conventional current is moving up the page. Since a conventional current is composedof positive charges, then the same current-carrying wire can also be described right hand grip rule as having a current with negativecharge carriers moving down the page.

Right Hand Rule for Magnetism

A cross product, or vector product, is created when an ordered operation is performed on two vectors, a and b. Thecross product of vectors a and b, is perpendicular to both a and b and is normal to the plane that contains it. Sincethere are two possible directions for a cross product, the right hand rule should be used to determine the directionof the cross product vector. The plane formed by the direction of the magnetic field and the charged particle’s velocity is at a right angle to the force. Because theforce occurs at a right angle to the plane formed by the particle’s velocity and the magnetic field, we can use the right hand rule todetermine their orientation.

However, we can ‘boost’ the magnetic field by adding an iron core. The relative permeability of a material is a measurement of how ‘transparent’ it is to magnetic field lines. The relative permeability of pure iron is about 1500 (no units since it’s relative permeability and we are comparing its magnetic properties with that of empty space). However, the core material used in the school laboratory is more likely to be steel rather than iron, which has a much more modest relative permeability of 100. De Graaf’s translation of Fleming’s left-hand rule – which uses thrust, field and current – and the right-hand rule, is the FBI rule. The FBI rule changes Thrust into F (Lorentz force), B (direction of the magnetic field) and I (current).

Torques that occur in a counter clockwise direction are positive torques. Alternatively, torques that occur in theclockwise direction are negative torques. Torques thatface out from the paper should be analyzed as positive torques, while torques that face inwards should be analyzedas negative torques.

A. Lorentz, a contemporary of Einstein, although its effects were known at the time of Michael Faraday.Now, some people and some books prefer to use the palm to represent the force, that would be current field force (open hand). It reveals a connection between the current and the magnetic field lines in the magnetic field that the current created. Ampère was inspired by fellow physicist Hans Christian Ørsted, who observed that needles swirled when in the proximity of an electric current-carrying wire and concluded that electricity could create magnetic fields. When an electric current passes through a straight wire, it induces a magnetic field.

So placing a steel nail in the centre of a solenoid boosts its magnetic field strength by a factor of 100 — which would make the solenoid roughly as strong as a typical bar magnet. Torque problems are often the most challenging topic for first year physics students. Luckily, there’s a right hand ruleapplication for torque as well. To use the right hand rule in torque problems, take your right hand and point it in thedirection of the position vector (r or d), then turn your fingers in the direction of the force and your thumb will pointtoward the direction of the torque. The N and S-poles of a solenoid can change depending on the direction of current flow and the geometry of the loops.

Lodestones are pieces of the ore magnetite that can attract iron. (The origin of the name is probably not what you think — it’s named after the region, Magnesia, where it was first found). In ancient times, lodestones were so rare and precious that they were worth more than their weight in gold. But these magnets have deflected the electrons from landing on their proper pixels. Normally they just point North, but when I turn the current on we see them all pointing around it, just as we predict with our right hand. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Positive and Negative Torques

1. To apply the right hand grip rule,align your thumb with the direction of the conventional current (positive to negative) and your fingers will indicate thedirection of the magnetic lines of flux.
2. Alternatively, torques that occur in theclockwise direction are negative torques.
3. However, we can ‘boost’ the magnetic field by adding an iron core.
4. However, left-handed materials have special properties – the negative refractive index.

The field lines seem to begin at the north pole and end at the south pole. A helix is a curved line formed by a point rotating around a center while the center moves up or down the z-axis. Helices are either right or left handed with curled fingers giving the direction of rotation and thumb giving the direction of advance along the z-axis.