Lenses Placed Very Close To Each Other

What type of interference pattern will be observed if two coheret sources are placed very close to each other?

Two identicaly induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance?

As shown in diagram, two perpendicular wire are placed very close to each other, but they are not touching each other. The points where the intensity of magnetic field is zero are-

Two fine slits are placed very close to each other and they are illuminated by a strong beam of light of wavelength 5900Å . Fringes are obtained at a distance of 0.3 m from the slits. The fringe width is found to be 5.9 xx 10^(-5)m . Calculate the distance between the slits.

Two coils of self inductance 100 mH and 400 mH are placed very closed to each other. Find maximum mutual inductance between the two when 4 A current passes through them.

Two identies conducting very large plates P_(1) and P_(2) having charges +4Q and +6Q are placed very closed to each other at separation d .The plate area of either face of the plate is A.the potential difference between plates P_(1) and P_(2) is

Two identical conducting very large plates P_1 and P_2 having charges +4Q and +6Q are placed very closed to each other at separation d. The plate area of either face of the plate is A. The potential difference between plates P_1 and P_2 is

Lense Placed At A Distance From Each Other

When two genes are situated very closed to each other in a chromosome

Two long wires each carrying a d.c. current in the same direction are placed close to each other. Which one of the following statements is correct?