An aeroplane with wing span 50 m is flying horizontally over a place where the vertical component of the earth-s magnetic field is 2- 10-4 Wbm-2- The potential difference between the tips of the wings is 1 V- The speed of the aeroplane is

Motional emf , e=Blv Substituting the data given in the question, 1=2× 10^ 4× 50 × v ⇒ v=10^2 or 100 ms^ 1 v=100×185 km/h=360 km/h. Hence, option (c) is th ...

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Standard IX

Physics

Plotting Non Uniform Field Lines

An aeroplane ...

Question

An aeroplane with wing span $50 m$ is flying horizontally over a place where the vertical component of the earth's magnetic field is $2 \times 10^{- 4} {Wbm}^{- 2}$ . The potential difference between the tips of the wings is $1 V$ . The speed of the aeroplane is

420 km/h

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540 km/h

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360 km/h

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180 km/h

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Solution

The correct option is C $360 km/h$
Motional emf , $e = B l v$

Substituting the data given in the question,

$1 = 2 \times 10^{- 4} \times 50 \times v$

$\Rightarrow v = 10^{2} or 100 {ms}^{- 1}$

$v = 100 \times \frac{18}{5} km/h = 360 km/h$ .

Hence, option (c) is the correct answer.

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An aeroplane with wing span 50 m is flying horizontally over a place where the vertical component of the earth's magnetic field is 2×10−4 Wbm−2. The potential difference between the tips of the wings is 1 V. The speed of the aeroplane is

The correct option is C 360 km/hMotional emf , e=Blv Substituting the data given in the question, 1=2×10−4×50×v ⇒v=102 or 100 ms−1 v=100×185 km/h=360 km/h. Hence, option (c) is the correct answer.

An aeroplane with wing span $50 m$ is flying horizontally over a place where the vertical component of the earth's magnetic field is $2 \times 10^{- 4} {Wbm}^{- 2}$ . The potential difference between the tips of the wings is $1 V$ . The speed of the aeroplane is

The correct option is C $360 km/h$
Motional emf , $e = B l v$

Substituting the data given in the question,

$1 = 2 \times 10^{- 4} \times 50 \times v$

$\Rightarrow v = 10^{2} or 100 {ms}^{- 1}$

$v = 100 \times \frac{18}{5} km/h = 360 km/h$ .

Hence, option (c) is the correct answer.