Question

The cost of a sapling of Mango, Jamun and Peepal is Rs 25, Rs 15 and Rs 10 each. The labour

cost for planting each sapling is Rs 0.70. The total amount that Ayushi has to get sanctioned for

plantation is -

a) Rs. 55382

b) Rs. 58352

c) Rs. 50382

d) Rs. 59362





Plz koi mujhe iska answer jaldi bata do plz​

Answer 1

Answer:

Two current carrying straight conductors placed near each other will exert (magnetic) forces on each other due to magnetic field of each other.

Figure shows two long parallel conductors separated by a distance d and bearing currents ia and ib. The conductor ‘a’ produces a magnetic field Ba at all points along the conductor ‘b’. The right-hand rule tells us that the direction of this field is downwards. Its magnitude is given by,

      Ba=2πdμoia

The conductor ‘b’ will experience a sideways force on account of the external field Ba. The direction of this force is towards the conductor ‘a’. you can verify this either by the cross product rule of vectors or by Fleming’s left hand rule. We label this force Fba, the force on a segment L of ‘b’ due to ‘a’. The magnitude of this force is given by,

     Fba=ibLBa

     LFba=2πdμoiaib

From considerations similar to above we can find that the force Fab, on a segment of length L of ‘a’ due to the current in ‘b’ is equal in magnitude to ‘b’ and directed towards ‘b’