The distance travelled by an object in time t is given by s = (2.5)t² . The instantaneous speed of the object at t = 5 s will be :
(1) 12.5 ms^–1
(2) 62.5 ms^–1
(3) 5 ms^–1
(4) 25 ms^–1
(2) 62.5 ms^–1
(3) 5 ms^–1
(4) 25 ms^–1
JEE-2024
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The magnetic field at the centre of a wire loop formed by two semi circular wires of radii R1 = 2 πm and R2 = 4π m carrying current I = 4A as per figure given below is a × 10^–7 T. The value of a is ______. (Centre O is common for all segments)
