GAT Test - 7...

Which one of the following statements about electric or magnetic fields is not true?

The magnetic field inside a long current-carrying solenoid

For a current carrying conductor, in the Maxwell's  'Right hand thumb law' the thumb points towards the

An electron enters a uniform magnetic field at right angles to it as shown. The direction of force acting on the electron is (consider the plane of the page to be horizontal)

Given below are two statements labelled as Assertion (A) and Reason (R)

Assertion (A): A proton and an electron, with same momenta, enter in a magnetic field in a direction at right angles to the lines of the force. The radius of the paths followed by them will be same.

Reason (R): Electron has less mass than the proton.

Select the most appropriate answer from the options given below:

The magnetic lines of force due to a bar magnet

The magnitude of the magnetic field B at a distance r from an infinitely long straight conductor through which a current I is flowing, is given by

Which of the following statement is not true; magnetic field at the centre of current carrying loop:-

If the forefingers shows the direction of the magnetic field and the thumb indicates the motion of the conductor, then, according to Fleming's left hand rule, what does the middle finger point at?

A circular coil of radius 0.50 m and 100 turns, carrying a current of 80 mA, is placed such that the normal to its plane makes an angle of 30° with a uniform magnetic field of 4.0 T. The magnitude of torque acting on the coil is: