listen with one ear remove it ✩ with the other

A vibrations magnetometer consists of two indentical bar magnet placed one over the other that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is 2^(5//4) s. One of the magnets is removed and if the other magnet oscillates in the same field, then the time period in second is :

Assertion : The process of reproduction does not suffer if one ovary is removed. Reason : The other enlarges to take over the function of the missing ovary too.

A vibraiton magnetometer consits of two idential bar magnets placed one over the other such that they are mutually perpendicular and bisect each other. The time period of oscillations of combination in a horizontal magnetic field is 4s . If one of the magnets is removed, then the period of oscillations of the other in teh same field is

A source and a listener are both moving towards each other with speed v//10 , where v is the speed of sound. If the frequency of the note emitted by the source is f , the frequency heard by the listener would be nearly

A source of sound and a listener both are moving in the same direction,the source following the listener. If the respective velocities of sound ,source and listener are v, v_s and v_'//s then the ratio of the actual frequency of the source and the apparent frequency as received by the listener is