The inductance L of this coil is defined as the flux linkage per unit current and its unit is Henry.
Λ = Flux linkage
I = current
Flux in coil A = 0.05 mWb = 5 × 10−5 wb = φA
No. of turns NA = NB = 1000
Flux linkage in a coil with B = Flux linkage in coil A × 80/100
= 0.8 × 5 × 10−5
= 4 × 10−5 wb =0.04 mwb
In the above option, the wood has the lowest calorific value. Its value is around 17000 – 20000 kilojoule/kg.
The calorific value of LPG is 55000 kilojoule/kg.
The calorific value of Kerosene oil is 45000 kilojoule/kg.
The calorific value of hydrogen oil is 150000 kilojoule/kg.
Mutual inductance between two coupled coils is given by the relation
M = K√L1L2
L1L2 = Inductance of the coil
K = Coefficient of coupling
When K = 1 coils are said to be tightly coupled and if K is a fraction the coils are said to be loosely coupled.
∴ m ≤ (L1 L2 )0.5