BlogNCERTTorque on a Magnetic Dipole 

Torque on a Magnetic Dipole 

Torque is a measurement of the force required to rotate an object around an axis. In linear kinematics, force leads an object to accelerate; in angular kinematics, torque causes an object to accelerate. Torque is a quantity that is measured as a vector. The torque vector’s direction is determined by the force acting on the axis. When opening a door, the person pushes on the side of the door that is furthest from the hinges. It takes a lot more force to push on the side closest to the hinges. Although the labour is the same in both circumstances (the larger force is exerted over a smaller distance), people prefer to use less force, which is why the door is usually located in the middle.

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    A brief outline

    There are two kinds of torque: static and dynamic.

    • The term “static torque” refers to a torque that does not cause an angular acceleration. Because the door does not rotate about its hinges despite the force provided, a static torque is applied to it when someone pushes on it. Because they are not accelerating, someone pedalling a bicycle at a steady speed is likewise applying a static torque.
    • Dynamic torque is carried by the drive shaft of a racing car accelerating from the start line because it must produce an angular acceleration of the wheels provided that the car is racing along the course.

    The vocabulary used to describe torque can be a bit perplexing. Engineers frequently use the terms moment and moment of force interchangeably. The moment arm refers to the radius with which the force acts. Torque, power, and energy are all terms that are often used interchangeably. For example, an engine’s torque is sometimes wrongly referred to as its ‘turning power.’ The dimensions of torque and energy are the same, yet they are not the same thing. Torque is a vector quantity that can only be stated for a rotatable system. If the speed of rotation is known, however, power can be computed from torque. In truth, an engine’s horsepower is usually derived from recorded torque and rotational speed rather than being measured directly.

    Important concepts

    Torque is the measurement of force causing an item to revolve around an axis. Torque is a vector field whose direction is influenced by the force acting on the axis. The torque vector’s magnitude is computed as follows:


    where r is the moment arm’s length and is the angle formed by the moment arm and the force vector.

    Electric dipole: An electric dipole is a pair of electric charges of equal magnitude but oppositely charged split by a distance d. The product of the magnitude of these charges and the range around them is the electric dipole moment for this. The electric dipole moment is a vector that has a clear direction from negative to positive charge.

    p = q ×d

    Torque’s Applications

    There is indeed a pivot point in any object that is subjected to torque. The following is an overview of applications:

    • Gyroscopes with Seesaws and Wrenches
    • When a swing or a chute swings, it causes torque.
    • A person who rides a bicycle.
    • On a mast, a flag is flying.

    What is the significance of torque?

    Torque is a basic physics notion that helps us understand how things work around us. Torque can be used to determine the direction and magnitude of a rotating force applied to an item, allowing you to assess the outcomes it may produce. Torque can be used to assess whether a force is exerted in a counterclockwise or clockwise direction. Torque can also be used to estimate the angular acceleration with which an object is turned. Because torque can be enormous or tiny, it is defined in a variety of units, as shown in the table below.

    Torque’s Importance

    • The concept of rotary movement of rigid bodies is explained by torque.
    • The idea of torque can be used to determine the direction and aim of a force applied to an object.
    • It also determines how a body moves clockwise and anti-clockwise.
    • When a body rotates, the torque also governs the angular acceleration.

    Significance of torque on a magnetic dipole in NEET exam

    These themes are shrouded in the NEET test. They are examined in the NCERT reading material for Physics, which is composed explicitly for the NEET test. From the endlessness learn site, understudies can find out with regards to such ideas as well as the determination of various recipes connected with them. There are likewise a few issue issues in the section’s activities to help you practice and appreciate the theme’s application. Understudies can likewise counsel physical science course books from different distributors.

    Vastness learn gives an assortment of materials to assist individuals with learning each subject in a precise way. Understudies can likewise utilize the review materials presented for self-study to study the subject. There are without a doubt test question sets that can be utilized to rehearse more inquiries and better get ready for the tests. By selecting on the site, which is totally free, any understudy can get to these assets. The remainder of the review materials is likewise accessible for download.

    Also read: Important Topic of Physics: Potential Difference

    Frequently asked questions (FAQs)

    Question 1: Please provide an example of a dipole and electric field in actual situations.

    Answer: Comb your dry hair and swiftly bring the comb to a few pieces of paper. It can be seen that the comb pushes the paper pieces together. This is due to induction, which causes the comb to collect charge. The comb, on the other hand, is known to polarise the paper pieces, resulting in a net dipole moment. Furthermore, because the electric field stays non-uniform, the bits of paper are drawn to the comb.

    Question 2: What is the difference between torque and force?

    Answer: In rotational physics, torque is the inverse of force. Torque is the ability of a force to cause a twist around an axis, which is the primary distinction between them.

    Question 3: What’s the connection between torque in an electric and magnetic medium?

    Answer: The product of force as well as the distance among the force acting point and the pivot point is defined as torque. Torque in an electric medium refers to the force felt in an electric field, while torque in a magnetic medium refers to the force felt in a magnetic field.


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