Ch no 4 physical class 12 pdf download

Also give the most stable position and most unstable position of magnetic dipole. A circular coil of n turns and radius R carries a current I. Calculate the ratio of magnetic moment of the new coil and the original coil. Hence, it turns. The initial velocity of the particle is either parallel or anti-parallel to the magnetic field. Hence, it travels along a straight path without suffering any deflection in the field. Yes, the final speed of the charged particle will be equal to its initial speed.

This is because magnetic force can change the direction of velocity, but not its magnitude. An electron travelling from West to East enters a chamber having a uniform electrostatic field in the North-South direction. This moving electron can remain undeflected if the electric force acting on it is equal and opposite of magnetic field.

What is the Magnitude of Torque Experienced by the Coil? Magnitude of the magnetic torque experienced by the coil in the magnetic field is given by the relation,.

Thus, the magnitude of the torque experienced by the coil is 0. The spring constants are identical for the meters. Determine the Ratio of:. On taking the ratio, we get,. Substituting the values we get,. On taking the ratio we get,. Explain Why the Path of the Electron is a Circle. Determine the Radius of the Circular Orbit. Magnetic force exerted on the electron in the magnetic field could be given as:. This force provides centripetal force to the moving electron and hence, the electron starts moving in a circular path of radius r.

Hence, centripetal force exerted on the electron would be,. However, we know that in equilibrium, the centripetal force exerted on the electron is equal to the magnetic force i.

Substituting the given values we get,. Clearly, we found the radius of the circular orbit to be 4. In Exercise 4. Does the Answer Depend on the Speed of the Electron? Velocity of the electron is related to the angular frequency as:.

In the circular orbit, the magnetic force on the electron provides the centripetal force. Thus, the frequency of the electron is around 18 MHz and is independent of the speed of the electron.

The coil will turn when it experiences a torque in the magnetic field. Ans: From the part a we could infer that the magnitude of the applied torque is not dependent on the shape of the coil. On the other hand, it is dependent on the area of the coil. Thus, we could say that the answer would not change if the circular coil in the above case is replaced by a planar coil of some irregular shape that encloses the same area.

Ans: We are given,. Magnetic field due to coil X at their centre is given by the relation,. Magnetic field due to coil Y at their centre is given by the relation,. Clearly, net magnetic field could be obtained as:. Suggest some appropriate design particulars to a solenoid for the required purpose. Assume the core is not ferromagnetic.

Magnetic field is given the relation,. If the length of the coil is taken as 50 cm, radius 4 cm, number of turns , and current 10 A, then these values are not unique for the given purpose.

There is always a possibility of some adjustments with limits. Magnetic field at a point on its axis at distance x is given by the relation,. This is the familiar result for the magnetic field at the centre of the coil. Let us consider point Q at distance d from the centre. Magnetic field at point Q could be given as:. Magnetic field due to this coil is given as:. Now we have the total magnetic field as,. Clearly, we proved that the field along the axis around the mid-point between the coils is uniform.

Magnetic field outside a toroid is zero. Centre of gravity: The height of females is usually found to be less in comparison to males. The center of gravity of females is less high and the height of the center of gravity of males is high.

This is the reason why the stability in females is more than in males. Sports medicine is a branch of healthcare. Projectile: an object thrown into space either horizontally or at an acute angle under the action of gravity is called a projectile. In the field of games and sport, there are many examples of projectiles such as putting the shot, throwing a hammer, discus, and javelin in athletics.

Generally, it is accepted as the study of behavior. Sports psychology is the branch of applied psychology which deals with sports performance and the Behavior of a player during training or competitions. Physical education class 12 handwritten notes in Hindi, physical education class 12 chapter 2 notes in Hindi, physical education 12th class keynotes in Hindi medium.

We have mentioned all the key points in Hindi and English. You can find all the short answer type and long answer type questions in the notes. So if you are trying to prepare for important question answers for your exams then these revision notes will serve the purpose. In this way, you can understand the material easily. The notes are prepared from the textbooks of class