Statement-I : if z₁ and z₂ are two nonzero complex numbers such that  then  is π/2.
Statement-II : z₁ and z₂ are two complex numbers such that  and  is π/2 then 

Consider the following reaction  The product A is

Benzoylation of phenol in alkaline medium is known is known as

In the figure shown a current I1 is established in the long straight wire AB. Another wire CD carrying current is placed in the plane of the paper. The line joining the ends of this wire is perpendicular to the wire AB. The force on the wire CD is

A mass spectrometer is a device which select particle of equal mass. An iron with electric charge starts at rest from a source S and is accelerated through a potential difference V. It passes through a hole into a region of constant magnetic field perpendicular to the plane of the paper as shown in the figure. The particle is deflected by the magnetic field and emerges through the bottom hole at a distance d from the top hole. The mass of the particle is

Find out B in the given reactions 

A current I flows a closed path in the horizontal plane of the circle as shown in the figure. The path consists of eight cars with alternating radii r and 2r. Each segment of arc subtends equal angle at the common centre P. The magnetic field produced by current path at point P is

Infinite number of straight wires each carrying current I are equally placed as shown in the figure. Adjacent wires have current in opposite direction. Net magnetic field at point P is

The charges 1, 2, 3 are moves in uniform transverse magnetic field then:–

Find out B in the given reactions 

A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If steady current I is established in the wire as shown in the figure, the loop will

Figure shows a square current carrying loop ABCD of side 10 cm and current i = 10 A. The magnetic moment of the loop is

A conducting rod of length l and mass m is moving down a smooth inclined plane of inclination qwith constant velocity v in fig. A current I is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upward magnetic field B exists in space. Then magnitude of magnetic field B is

The square loop ABCD, carrying a current I, is placed in a uniform magnetic field B, as shown. The loop can rotate about the axis XX. The plane of the loop makes an angle with the direction of B. Through what angle will the loop rotate by itself before the torque on it becomes zero–

 In the above reaction Z is

In the given figure, and , then the value of is

Hence Choice 3 is correct