Tricky Quiz! Hint at the end! #shorts #maths #puzzle

The current in a solenoid of 500 turns, having length of 15 cm and a radius of 5 cm, is 3.5 A. The current is suddenly switched off in a short duration of Ims. Calculate the average back emf induced across the ends of the open switch in the circuit.

Kamala borrowed Rs 26,400 from a Bank to buy a scooter at a rate of 15% p.a. compounded yearly.What amount will she pay at the end of 2 years and 4 months to clear the loan? (Hint: Find A for 2years with interest is compounded yearly and then find SI on the 2nd year amount for (4)/(12) years )

A child receives a tall beautiful plant as a birthday gift from his father with a quiz. The father asked her how she would verify whether this tall plant was the progeny of both the tall parents or one tall and one short parent plant. She could verify this through

A smooth circular tube of radius R is fixed in a vertical plane. A particle is projectid from its lowest point with a velocity just sufficient to carry it to th ehigest point. Show that the time taken by the particle to rach the end of the horizontal diameter is (sqrt(R)/(g))In(1+sqrt(2)) . Hint : intsectheta.dtheta=In(sectheta+tantheta)

A flexible chain of weight W hangs between two fixed points A and B at the same level. The inclination of the chain with the horizontal at the two points of support is theta . Calculated the tension of the chain at end points and also at the lower most point . [Hints : Consider equilibrium of each half of the chain. ]