Torque causes an object to spin around a fixed axis. Each loop of current has a direction associated with it: its normal vector is perpendicular to the loop, in the direction given by the right thumb when the right fingers curl in the direction of the current.Thereof, what is Torque on a current loop?
The Torque on a Current Loop A uniform magnetic field exerts no net force on a current loop but it does exert a net torque. The torque about this axis is: τ = F (a/2) + F (a/2) = Fa = IabB. ab is the area of the loop, so the torque is, in this case, τ = IAB.
Likewise, does torque have direction? Torque is inherently a vector quantity. Part of the torque calculation is the determination of direction. The direction is perpendicular to both the radius from the axis and to the force. It is conventional to choose it in the right hand rule direction along the axis of rotation.
Correspondingly, what is the position of the loop when the current is maximum?
The maximum current is when the loop is halfway into the region of the field. The maximum current is when the loop is at the beginning of the region of the field. The maximum current is when the loop is at the end of the region of the field.
What is the right hand rule for torque?
The direction of the torque can be found by the right-hand rule for cross products: put your fingers in the direction of the first vector ( ) and your palm facing in the direction of the second vector ( ); your thumb will point in the direction of the cross product ( ).
What do you mean by torque?
Torque is a twisting or turning force that tends to cause rotation around an axis, which might be a center of mass or a fixed point. Torque is sometimes confused with work, which is defined as force applied over a distance. However, torsion (twisting) is integral to the definition of torque.Why does torque have direction?
The direction of the force is important because the resulting motion of the object is in the same direction as the force. The product of the force and the perpendicular distance to the center of gravity for an unconfined object, or to the pivot for a confined object, is^M called the torque or the moment.Why is torque perpendicular?
Because that force is perpendicular to the direction towards the rotation-centre. Not to the turning direction. The bolt does indeed turn in the same way as the force pulls it. The force vector →F times the vector towards the rotation-centre →r gives the torque vector.How do you know if torque is positive or negative?
Torque is a vector quantity that has direction as well as magnitude. Turning the handle of a screwdriver clockwise and then counterclockwise will advance the screw first inward and then outward. By convention, counterclockwise torques are positive and clockwise torques are negative.How do you find maximum torque?
Note that the torque is maximum when the angle is 90 degrees. A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force.Which way will this current loop rotate?
As shown in Figure 19.22, the current reverses direction in the loop every half- rotation. From our perspective, however, the current always goes clockwise around the loop, which is why the torque is always in the same direction.What is the torque on the coil?
Magnetic moment of a coil The quantity N/A is called the magnetic moment of the coil, and is usually defined as the torque exerted on it when placed with its plane parallel to a field of unit magnitude where A (= ab) is the area of the coil.What is magnetic torque?
Magnetic torque (τ) is the mechanical couple acting on a magnetically anisotropic substance in a homogeneous magnetic field B.Is Biot Savart legal?
In physics, specifically electromagnetism, the Biot–Savart law (/ˈbiːo? s?ˈv?ːr/ or /ˈbjo? s?ˈv?ːr/) is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current.What is torque measured in?
Torque is measured in pounds-feet, meaning a force in pounds acting on the end of a lever measured in feet. For example, if that lug wrench is 2 feet (0.6 m) long, and you put 100 pounds (45.4 kg) of force on it, you are putting 200 pounds-feet (27.65 kg/m) of torque onto the bolt.How is torque produced?
Torque is a force that tends to rotate or turn things. You generate a torque any time you apply a force using a wrench. A car engine creates torque and uses it to spin the crankshaft. This torque is created exactly the same way: A force is applied at a distance.What does it mean if the net torque is zero?
Because there is no net torque acting on an object in equilibrium, an object at rest will stay at rest, and an object in constant angular motion will stay in angular motion. Because the net torque is equal to zero, the torques in Example 1 are balanced and acting in equilibrium.How do you induce current?
Induced current is generally produced when current in a conductor changes , so if you take a magnet towards a c conductor and start moving it to and fro from the conductor , you will be able to produce induced current ..How do you determine if current is clockwise or counterclockwise?
It is "clockwise" when you look at your hand thumb-on, or when you look at the change pointing towards you. This means that if a current follows that curling, it goes to a higher voltage; or if it opposes that curling, it goes to a lower voltage. This same "reverse" rule can also be phrased as Lenz's law.How can an EMF be induced in a loop?
There are therefore three ways an emf can be induced in a loop: Change the magnetic field. Change the area of the loop. Change the angle between the field and the loop.How do you determine the direction of an induced emf?
Stretch the forefinger, middle finger and the thumb of the right hand mutually perpendicular to each other. If the force finger points in the direction of the magnetic field, the thumb gives the direction of the motion of the conductor then the middle finger gives the direction of the induced current.What does Lenz's law state?
Lenz's law states that the current induced in a circuit due to a change or a motion in a magnetic field is so directed as to oppose the change in flux and to exert a mechanical force opposing the motion. 
