1.

F ∝ 1/d², when d = 5, f = 18. Hence, (i) if d = 10 find f. (ii) when f = 50 find d .

Answer» HI ,

It is given that ,

f is inversely variance with d²

Therefore ,

f = C/d² [ C is a constant ]

f1 × d1² = f2 × d2²


i ) Here ,

D1 = 5 , f1 = 18

d2 = 10 , f2 = ?

f1 × d1² = f2 × d2²

18 × 5² = f2 × 10²

f2 = ( 18 × 25 )/100

f2 = 450/100

f2 = 4.5

ii ) d1 = 5 , f1 = 18 ,

f2 = 50 , d2 = ?

50 × d2² = 18 × 5²

d2² = ( 18 × 25 )/50

d2² = 9

d2 = √9

d2 = 3

I hope this helps you.

: )



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