Question:easy
An aeroplane having a wing span of 30 m flies due north with the speed of 170 m/s. Magnetic field \(B = 3.6\times 10^{-5}\) T. The potential difference between the tips of the wings will be
An aeroplane having a wing span of 30 m flies due north with the speed of 170 m/s. Magnetic field \(B = 3.6\times 10^{-5}\) T. The potential difference between the tips of the wings will be
Show Hint
The wing tips behave as the ends of a rod moving across the field: emf = B l v.
Updated On: Oct 1, 2026
- \(136.4\) mV
- \(183.6\) mV
- \(272.8\) mV
- \(367.2\) mV
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Approach
Compute the product in pieces.
Step 2: Pieces
$Bv=3.6\times10^{-5}\times170=6.12\times10^{-3}$ V/m. Multiply by $l=30$ m: $0.1836$ V.
Step 3: Answer
$183.6$ mV, option (B).
Final Answer:
The emf is B l v = 3.6e-5 x 30 x 170 = 0.1836 V, option (B). \[ \boxed{183.6\ \text{mV}} \]
Compute the product in pieces.
Step 2: Pieces
$Bv=3.6\times10^{-5}\times170=6.12\times10^{-3}$ V/m. Multiply by $l=30$ m: $0.1836$ V.
Step 3: Answer
$183.6$ mV, option (B).
Final Answer:
The emf is B l v = 3.6e-5 x 30 x 170 = 0.1836 V, option (B). \[ \boxed{183.6\ \text{mV}} \]
Was this answer helpful?
0
Top Questions on Motional Electromotive Force
- A wire of length \( L \) and resistance \( R \) is falling vertically through Earth's horizontal magnetic field \( B \). What is the current induced in the wire when it has fallen a height \( L \)? (Take acceleration due to gravity as \( g \))
- MHT CET - 2025
- Physics
- Motional Electromotive Force
- Figure shows a rectangular conductor PQRS in which the conductor PQ is free to move. The conductor PQ is moved towards the left with a constant velocity V as shown in the figure. Assume that there is no loss of energy due to friction. What will be the magnetic flux linked with the loop PQRS and the motional emf?
\includegraphics[width=0.5\linewidth]{2.png}- CUET (UG) - 2025
- Physics
- Motional Electromotive Force
- In the figure shown, the conductor PQ of length \(l\) is moved from \(x = 0\) to \(x = b\) and then up to \(x = 2b\) with a constant velocity \(\vec{v}\). A uniform magnetic field \(\vec{B}\) is perpendicular to the plane of the paper and extends from \(x = 0\) to \(x = b\) and it is zero from \(x>b\). The magnitude of emf induced in the conductor is
- KCET - 2026
- Physics
- Motional Electromotive Force
- A conductor is moving with a speed of $10 \text{ m/s}$ in the direction perpendicular to the direction of magnetic field of induction $0.8 \text{ T}$. If it induces an E.M.F. of $8 \text{ V}$ between the ends of the conductor, the length of the conductor is \dots
- TS POLYCET - 2026
- Physics
- Motional Electromotive Force
- Want to practice more? Try solving extra ecology questions todayView All Questions