Physics Test 116

The figure shows a conducting loop ABCDA placed in a uniform magnetic field (strength B) perpendicular to its plane. The part ABC is the (3/4)^th portion of the square of side length ℓ. The part ADC is a circular arc of radius R. The points A and C are connected to a battery which supply a current I to the circuit. The magnetic force on the loop due to the field B is

A wire is bent in the form of a circular arc with a straight portion AB. If the current in the wire is i, then the magnetic induction at O is :-

A point-like object of mass 2.0 kg moves along the x-axis with a velocity of +4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?

A particle initially at rest is displaced from x = –10 m to x = +10m. Under the influence of  force F as shown in the figure. Now the kinetic energy vs position graph of the particle is

A particle of mass m and charge q enters a region of magnetic field (as shown) with speed v. There is a region in which the magnetic field is absent, as shown, The particle after entering the region collides elastically with a rigid wall. Time after which the velocity is anti-parallel to initial velocity

The drawing shows a thin, uniform rod that has a length of 0.45 m and a mass of 0.09 kg. This rod lies in the plane of the paper and is attached to the floor by a hinge at point P. A uniform magnetic field of 0.36 T is directed perpendicularly into the plane of the paper. There is a current I = 4.0 A in the rod, and rod does not rotate clockwise or counterclockwise. Find the angle θ.

A single circular loop of wire with radius 0.02 m carries a current of 8.0 A. It is placed at the centre of a long solenoid that has length 0.65m, radius 0.080 m and 1300 turns. (Axis of circular loop coincide with axis of solenoid). Let 'i' be the current in solenoid.

A steady current flows through an infinite wire. In the given figure, B is magnetic field at P due to shown segment AB of an infinite current carrying wire. An amperian loop is taken as shown in figure. Which of the following statement(s) is/are correct.

Block A has no relative motion with respect to wedge fixed to the lift as shown in figure during motion-1 or motion-2 :-

A block of mass m = 10 kg  is attached with a massless spring of force constant k. The block is placed over a rough inclined surface for which the coefficient of friction is µ = 1. The possible value(s) of M required to move the block up the plane is : (Neglect mass of string and pulley and friction in pulley) Initially spring is in natural length