NEET Test Series from KOTA - 10 Papers In MS WORD
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Electromagnetic Wave
155673
Which one the following is the property if a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contributions of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of $\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{E}}$
4 The pressure exerted by the wave is the product of its speed and energy density
Explanation:
B The energy contribution of both electric and magnetic fields are equal property of a monochromatic plane electromagnetic wave in free space. Electromagnetic wave carry energy as they travel through space and this energy is shared equally by electric and magnetic fields.
AP EAMCET-25.08.2021
Electromagnetic Wave
155674
The propagation constant or angular wave number is
1 $\frac{\lambda}{2 \pi}$
2 $\frac{\lambda}{\pi}$
3 $\frac{\pi}{\lambda}$
4 $\frac{2 \pi}{\lambda}$
Explanation:
D Electromagnetic waves travel in a sinusoidal pattern. The propagation constant is defined as the change in amplitude and phase per unit distance. It is a dimensionless quantity and changes significantly with angular frequency. During vibration the phase difference between the particles which are situated at a unit distance is called the wave propagation constant. It is also called the angular wave number since, the phase difference is $2 \pi$ in the distance, $\mathrm{k}=\frac{2 \pi}{\lambda}$
AP EAMCET-06.09.2021
Electromagnetic Wave
155676
Thermopile Bolometer is used to detect
1 ultraviolet radiation
2 x-rays
3 gamma radiation
4 infrared radiation
Explanation:
D Thermopile is an electronic device that converts thermal energy to electrical energy composed of several thermocouples connected in series or parallel. Infrared radiations can be detected by thermopile.
TS EAMCET 05.08.2021
Electromagnetic Wave
155677
The electromagnetic waves of frequency $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are used
1 In ground wave propagation
2 In sky wave propagation
3 In microwave propagation
4 In satellite communication
Explanation:
B The electromagnetic wave of frequency range of $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are reflected from the ionized upper layers of earth's atmosphere. So, it is used in sky wave propagation.
155673
Which one the following is the property if a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contributions of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of $\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{E}}$
4 The pressure exerted by the wave is the product of its speed and energy density
Explanation:
B The energy contribution of both electric and magnetic fields are equal property of a monochromatic plane electromagnetic wave in free space. Electromagnetic wave carry energy as they travel through space and this energy is shared equally by electric and magnetic fields.
AP EAMCET-25.08.2021
Electromagnetic Wave
155674
The propagation constant or angular wave number is
1 $\frac{\lambda}{2 \pi}$
2 $\frac{\lambda}{\pi}$
3 $\frac{\pi}{\lambda}$
4 $\frac{2 \pi}{\lambda}$
Explanation:
D Electromagnetic waves travel in a sinusoidal pattern. The propagation constant is defined as the change in amplitude and phase per unit distance. It is a dimensionless quantity and changes significantly with angular frequency. During vibration the phase difference between the particles which are situated at a unit distance is called the wave propagation constant. It is also called the angular wave number since, the phase difference is $2 \pi$ in the distance, $\mathrm{k}=\frac{2 \pi}{\lambda}$
AP EAMCET-06.09.2021
Electromagnetic Wave
155676
Thermopile Bolometer is used to detect
1 ultraviolet radiation
2 x-rays
3 gamma radiation
4 infrared radiation
Explanation:
D Thermopile is an electronic device that converts thermal energy to electrical energy composed of several thermocouples connected in series or parallel. Infrared radiations can be detected by thermopile.
TS EAMCET 05.08.2021
Electromagnetic Wave
155677
The electromagnetic waves of frequency $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are used
1 In ground wave propagation
2 In sky wave propagation
3 In microwave propagation
4 In satellite communication
Explanation:
B The electromagnetic wave of frequency range of $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are reflected from the ionized upper layers of earth's atmosphere. So, it is used in sky wave propagation.
155673
Which one the following is the property if a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contributions of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of $\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{E}}$
4 The pressure exerted by the wave is the product of its speed and energy density
Explanation:
B The energy contribution of both electric and magnetic fields are equal property of a monochromatic plane electromagnetic wave in free space. Electromagnetic wave carry energy as they travel through space and this energy is shared equally by electric and magnetic fields.
AP EAMCET-25.08.2021
Electromagnetic Wave
155674
The propagation constant or angular wave number is
1 $\frac{\lambda}{2 \pi}$
2 $\frac{\lambda}{\pi}$
3 $\frac{\pi}{\lambda}$
4 $\frac{2 \pi}{\lambda}$
Explanation:
D Electromagnetic waves travel in a sinusoidal pattern. The propagation constant is defined as the change in amplitude and phase per unit distance. It is a dimensionless quantity and changes significantly with angular frequency. During vibration the phase difference between the particles which are situated at a unit distance is called the wave propagation constant. It is also called the angular wave number since, the phase difference is $2 \pi$ in the distance, $\mathrm{k}=\frac{2 \pi}{\lambda}$
AP EAMCET-06.09.2021
Electromagnetic Wave
155676
Thermopile Bolometer is used to detect
1 ultraviolet radiation
2 x-rays
3 gamma radiation
4 infrared radiation
Explanation:
D Thermopile is an electronic device that converts thermal energy to electrical energy composed of several thermocouples connected in series or parallel. Infrared radiations can be detected by thermopile.
TS EAMCET 05.08.2021
Electromagnetic Wave
155677
The electromagnetic waves of frequency $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are used
1 In ground wave propagation
2 In sky wave propagation
3 In microwave propagation
4 In satellite communication
Explanation:
B The electromagnetic wave of frequency range of $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are reflected from the ionized upper layers of earth's atmosphere. So, it is used in sky wave propagation.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Electromagnetic Wave
155673
Which one the following is the property if a monochromatic, plane electromagnetic wave in free space?
1 Electric and magnetic fields have a phase difference of $\frac{\pi}{2}$
2 The energy contributions of both electric and magnetic fields are equal
3 The direction of propagation is in the direction of $\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{E}}$
4 The pressure exerted by the wave is the product of its speed and energy density
Explanation:
B The energy contribution of both electric and magnetic fields are equal property of a monochromatic plane electromagnetic wave in free space. Electromagnetic wave carry energy as they travel through space and this energy is shared equally by electric and magnetic fields.
AP EAMCET-25.08.2021
Electromagnetic Wave
155674
The propagation constant or angular wave number is
1 $\frac{\lambda}{2 \pi}$
2 $\frac{\lambda}{\pi}$
3 $\frac{\pi}{\lambda}$
4 $\frac{2 \pi}{\lambda}$
Explanation:
D Electromagnetic waves travel in a sinusoidal pattern. The propagation constant is defined as the change in amplitude and phase per unit distance. It is a dimensionless quantity and changes significantly with angular frequency. During vibration the phase difference between the particles which are situated at a unit distance is called the wave propagation constant. It is also called the angular wave number since, the phase difference is $2 \pi$ in the distance, $\mathrm{k}=\frac{2 \pi}{\lambda}$
AP EAMCET-06.09.2021
Electromagnetic Wave
155676
Thermopile Bolometer is used to detect
1 ultraviolet radiation
2 x-rays
3 gamma radiation
4 infrared radiation
Explanation:
D Thermopile is an electronic device that converts thermal energy to electrical energy composed of several thermocouples connected in series or parallel. Infrared radiations can be detected by thermopile.
TS EAMCET 05.08.2021
Electromagnetic Wave
155677
The electromagnetic waves of frequency $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are used
1 In ground wave propagation
2 In sky wave propagation
3 In microwave propagation
4 In satellite communication
Explanation:
B The electromagnetic wave of frequency range of $2 \mathrm{MHz}$ to $30 \mathrm{MHz}$ are reflected from the ionized upper layers of earth's atmosphere. So, it is used in sky wave propagation.