The figure shows an isosceles triangle wire frame with apex angle equal to $π / 2$ . The
frame starts entering into the region of uniform magnetic field $B$ with constant velocity
$v$ at $t = 0$ . The longest side of the frame is perpendicular to the direction of velocity.
If i is the instantaneous current through the frame then choose the alternative showing
the correct variation of i with time

Question

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Answer 1

The rate of change of area in the field starts from zero as the tip enters the field and grows linearly with time until it reaches the maximum value as the last slice enters; after that the whole loop is in the field so the flux through the loop is constant and there is no induced emf. hence the correct option is (d)

Answer 2

The rate of change of area in the field starts from zero as the tip enters the field and grows linearly with time until it reaches the maximum value as the last slice enters; after that the whole loop is in the field so the flux through the loop is constant and there is no induced emf. hence the correct option is (d)

A charged particle enters a region of a uniform magnetic field at an angle of $8 5^{o}$ to the magnetic lines of force. The path of the particle is a circle.

How are the field lines in a uniform magnetic field ?

A current carrying closed loop in the form of a right angle isosceles triangle $A B C$ is placed in a uniform magnetic field acting along $A B$ . If the magnetic force on the arm $B C$ is $F$ , the force on the arm $A C$ is

In a uniform magnetic field, the field lines are:

Revise with Concepts

Properties of Magnetic Field Lines Around a Bar Magnet

A charged particle enters a region of a uniform magnetic field at an angle of 85o to the magnetic lines of force. The path of the particle is a circle.