A plane electromagnetic wave of frequency 20 MHz travels in free space slong the +x direction. At a particular point in space and time, the electric field vector of the wave is . Then, the magnetic field vector of the wave at the point is [2025]

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Q.
A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the electric field vector of the wave is $E_{y} = 9.3 {Vm}^{- 1}$ . Then, the magnetic field vector of the wave at the point is [2025]

Solution

Q.
A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the electric field vector of the wave is $E_{y} = 9.3 {Vm}^{- 1}$ . Then, the magnetic field vector of the wave at the point is [2025]

1 $B_{z} = 9.3 \times 10^{- 8} T$

2 $B_{z} = 1.55 \times 10^{- 8} T$

3 $B_{z} = 6.2 \times 10^{- 8} T$

4 $B_{z} = 3.1 \times 10^{- 8} T$

Ans.
(4)

E = BC

$9.3 = B \times 3 \times 10^{8}$

$B = \frac{9.3}{3 \times 10^{8}} = 3.1 \times 10^{- 8} T$

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Solution

Q. A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the electric field vector of the wave is Ey=9.3 Vm–1. Then, the magnetic field vector of the wave at the point is [2025]

1 Bz=9.3×10–8T

2 Bz=1.55×10–8T

3 Bz=6.2×10–8T

4 Bz=3.1×10–8T

Ans. (4) E = BC 9.3=B×3×108 B=9.33×108=3.1×10–8T

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Q.
A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and time, the electric field vector of the wave is $E_{y} = 9.3 {Vm}^{- 1}$ . Then, the magnetic field vector of the wave at the point is [2025]

1 $B_{z} = 9.3 \times 10^{- 8} T$

2 $B_{z} = 1.55 \times 10^{- 8} T$

3 $B_{z} = 6.2 \times 10^{- 8} T$

4 $B_{z} = 3.1 \times 10^{- 8} T$

Ans.
(4)

E = BC

$9.3 = B \times 3 \times 10^{8}$

$B = \frac{9.3}{3 \times 10^{8}} = 3.1 \times 10^{- 8} T$