155545
Which of the following has zero average value in a plane electromagnetic wave?
1 Kinetic energy
2 Magnetic field
3 Electric field
4 Both (b) and (c)
Explanation:
D We know that nature of electric field \& magnetic field are sinusoidal in electromagnetic wave. and average value of sinusoidal wave is 0 .
UPSEE - 2013
Electromagnetic Wave
155547
If the directions of electric and magnetic field vectors of a plane electromagnetic wave are along positive $y$-direction and positive $z$ direction respectively, then the direction of propagation of the wave is along
1 positive $z$ - direction
2 negative $z$ - direction
3 negative $y$ - direction
4 positive $x$ - direction
5 negative $x$ - direction
Explanation:
D The direction of propagation of wave always perpendicular to electric \& magnetic field vector. So, it will be along positive $\mathrm{x}$ direction.
Kerala CEE - 2016
Electromagnetic Wave
155549
Which one of the following is the property of a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contribution of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of electric field $\mathrm{E}$
4 The pressure exerted by the wave is the product of energy density and the speed of the wave
5 The speed of the wave is $B / E$
Explanation:
B The energy contribution of electric \& magnetic fields are equal, property of a monochromatic plane electromagnetic wave in free space.
Kerala CEE- 2014
Electromagnetic Wave
155551
The electromagnetic waves travel with
1 the same speed in all media
2 the speed of sound in free space
3 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in solid medium
4 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in fluid medium
5 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in free space
Explanation:
E Electromagnetic wave travels with speed of light in free space. $\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
155545
Which of the following has zero average value in a plane electromagnetic wave?
1 Kinetic energy
2 Magnetic field
3 Electric field
4 Both (b) and (c)
Explanation:
D We know that nature of electric field \& magnetic field are sinusoidal in electromagnetic wave. and average value of sinusoidal wave is 0 .
UPSEE - 2013
Electromagnetic Wave
155547
If the directions of electric and magnetic field vectors of a plane electromagnetic wave are along positive $y$-direction and positive $z$ direction respectively, then the direction of propagation of the wave is along
1 positive $z$ - direction
2 negative $z$ - direction
3 negative $y$ - direction
4 positive $x$ - direction
5 negative $x$ - direction
Explanation:
D The direction of propagation of wave always perpendicular to electric \& magnetic field vector. So, it will be along positive $\mathrm{x}$ direction.
Kerala CEE - 2016
Electromagnetic Wave
155549
Which one of the following is the property of a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contribution of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of electric field $\mathrm{E}$
4 The pressure exerted by the wave is the product of energy density and the speed of the wave
5 The speed of the wave is $B / E$
Explanation:
B The energy contribution of electric \& magnetic fields are equal, property of a monochromatic plane electromagnetic wave in free space.
Kerala CEE- 2014
Electromagnetic Wave
155551
The electromagnetic waves travel with
1 the same speed in all media
2 the speed of sound in free space
3 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in solid medium
4 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in fluid medium
5 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in free space
Explanation:
E Electromagnetic wave travels with speed of light in free space. $\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
155545
Which of the following has zero average value in a plane electromagnetic wave?
1 Kinetic energy
2 Magnetic field
3 Electric field
4 Both (b) and (c)
Explanation:
D We know that nature of electric field \& magnetic field are sinusoidal in electromagnetic wave. and average value of sinusoidal wave is 0 .
UPSEE - 2013
Electromagnetic Wave
155547
If the directions of electric and magnetic field vectors of a plane electromagnetic wave are along positive $y$-direction and positive $z$ direction respectively, then the direction of propagation of the wave is along
1 positive $z$ - direction
2 negative $z$ - direction
3 negative $y$ - direction
4 positive $x$ - direction
5 negative $x$ - direction
Explanation:
D The direction of propagation of wave always perpendicular to electric \& magnetic field vector. So, it will be along positive $\mathrm{x}$ direction.
Kerala CEE - 2016
Electromagnetic Wave
155549
Which one of the following is the property of a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contribution of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of electric field $\mathrm{E}$
4 The pressure exerted by the wave is the product of energy density and the speed of the wave
5 The speed of the wave is $B / E$
Explanation:
B The energy contribution of electric \& magnetic fields are equal, property of a monochromatic plane electromagnetic wave in free space.
Kerala CEE- 2014
Electromagnetic Wave
155551
The electromagnetic waves travel with
1 the same speed in all media
2 the speed of sound in free space
3 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in solid medium
4 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in fluid medium
5 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in free space
Explanation:
E Electromagnetic wave travels with speed of light in free space. $\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
155545
Which of the following has zero average value in a plane electromagnetic wave?
1 Kinetic energy
2 Magnetic field
3 Electric field
4 Both (b) and (c)
Explanation:
D We know that nature of electric field \& magnetic field are sinusoidal in electromagnetic wave. and average value of sinusoidal wave is 0 .
UPSEE - 2013
Electromagnetic Wave
155547
If the directions of electric and magnetic field vectors of a plane electromagnetic wave are along positive $y$-direction and positive $z$ direction respectively, then the direction of propagation of the wave is along
1 positive $z$ - direction
2 negative $z$ - direction
3 negative $y$ - direction
4 positive $x$ - direction
5 negative $x$ - direction
Explanation:
D The direction of propagation of wave always perpendicular to electric \& magnetic field vector. So, it will be along positive $\mathrm{x}$ direction.
Kerala CEE - 2016
Electromagnetic Wave
155549
Which one of the following is the property of a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contribution of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of electric field $\mathrm{E}$
4 The pressure exerted by the wave is the product of energy density and the speed of the wave
5 The speed of the wave is $B / E$
Explanation:
B The energy contribution of electric \& magnetic fields are equal, property of a monochromatic plane electromagnetic wave in free space.
Kerala CEE- 2014
Electromagnetic Wave
155551
The electromagnetic waves travel with
1 the same speed in all media
2 the speed of sound in free space
3 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in solid medium
4 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in fluid medium
5 the speed of light $\mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1}$ in free space
Explanation:
E Electromagnetic wave travels with speed of light in free space. $\mathrm{c}=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$
