Two circular coils have diameters 10cm a...

Two circular coils have diameters `10cm` and `20cm` with same number of turns. The ratio of the magnetic field induction produced at the centre of the coils when connected in series is

`1:2`

`2:1`

`4:1`

`1:4`

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The correct Answer is:

`B prop 1/r`

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NARAYNA-MOVING CHARGES AND MAGNETISM-EXERCISE - 1(C.W) (AMPERE.S CIRCUITAL LAW BIOT-SAVART LAW AND ITS APPLICATIONS)

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