Question

Which of the following is a way to use water economically?
(a) Construction of bawris
(b) Rainwater harvesting
(c) sprinkler system
(d) Infiltration

Answer 1

Answer:

b) rainwater harvesting

Explanation:

rainwater harvesting is the method to use water economically. As in drip irrigation system the water is supplied drop by drop to plants which does not cause the wastage of water and supply as per the needs of the plants.

Answer 2

Answer:

In magnetic laboratory of Govt. College University, 37.200 tesla value of magnetic field is achieved. For

achieve such magnetic field,

(i). Calculate the value of required electric current at 2 ×10-2 m from the long wire

(ii). Compute the value of required electric current at the center of coil made up of 100 turns with

radius 42 ×10-2 m

(iii). Determine the value of required electric current near the center of solenoid made up 4× 104

turns

with radius 2.4×10-2 m and its length 32×10-2 m.