Whenever a wave is incident on a perfect conductor then the reflection coefficient is

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Whenever a wave is incident on a perfect conductor then the reflection coefficient is 0.

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Find the reflection coefficient of a wave with an incident electric field of 5 units and reflected electric field of 2 units. a) 2.5 b) 0.4 c) 0.8 d) 1.2

Description : Find the reflection coefficient of a wave with an incident electric field of 5 units and reflected electric field of 2 units. a) 2.5 b) 0.4 c) 0.8 d) 1.2

Last Answer : b) 0.4

For transmission line, the incident voltage Ei = 6V, and Er = 3V. Calculate: (1) Reflection coefficient (2) Standing wave ratio

Description : For transmission line, the incident voltage Ei = 6V, and Er = 3V. Calculate: (1) Reflection coefficient (2) Standing wave ratio

Last Answer : (1)Reflection coefficient  (2) Standing wave ratio (1)Reflection coefficient Reflection coefficient R=Er/Ei  =3/6  R=0.5 (2) Standing wave ratio SWR=Ei+Er/Ei-Er  =6+3/6-3  SWR =3

a) For a transmission line, Find SWR and reflection coefficient R if, i. There is no reflected voltage. ii. Reflected voltage and incident voltage is equal. iii. If reflected voltage=20V and incident voltage=10V. iv. If reflected voltage=10V and incident voltage =20V.

Description : a) For a transmission line, Find SWR and reflection coefficient R if, i. There is no reflected voltage. ii. Reflected voltage and incident voltage is equal. iii. If reflected voltage=20V and incident voltage=10V. iv. If reflected voltage=10V and incident voltage =20V.

Last Answer : reflection coefficient R=Vr/Vi i. There is no reflected voltage. i.e,Vr=0 R=0 SWR= 1+R/1-R=1 ii. Reflected voltage and incident voltage is equal. Vr=Vi; R=1 SWR= 1+R/1-R=1+1/1-1=infinity iii. If reflected ... and incident voltage =20V. Vr=10 and Vi=20 R=10/20=0.5 SWR= 1+R/1-R=1+.5/1-.5=3 

For a transmission line, the incident voltage. Ei = 6V and Er =2V ,Calculate: (i) Reflection Coefficient (ii) SWR

Description : For a transmission line, the incident voltage. Ei = 6V and Er =2V ,Calculate: (i) Reflection Coefficient (ii) SWR

Last Answer : Reflection Coefficient(K) = Er / Ei  = 2V / 6V  K = 0.333 SWR = 1+K / 1- K  = 1+0.333 / 1-0.333  = 1.333 / 0.667 SWR= 1.998

A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes- (1) x/2 (2) x (3) 2x (4) x/4

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Last Answer : (2) x Explanation: When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.

A wave incident on a surface at an angle 60 degree is having field intensity of 6 units. The reflected wave is at an angle of 30 degree. Find the field intensity after reflection. a) 9.4 b) 8.4 c) 10.4 d) 7.4

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An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as: (A) Fresnel reflection (B) Fresnel refraction (C) Snell's law (D) None of these

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A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes :

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The transmission coefficient of a wave with incident and transmitted electric field of 5 and 5 respectively is a) 0 b) 1 c) 10 d) 5

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Find the reflection coefficient of the wave with SWR of 3.5. a) 0.55 b) 0.23 c) 0.48 d) 0.68

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Last Answer : a) 0.55

Calculate the transmission coefficient of a wave with a reflection coefficient of 0.6 a) 0.6 b) 1 c) 0 d) 0.4

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Last Answer : d) 0.4

The reflection coefficient in the wave propagation when it is transmitted with the Brewster angle is a) 0 b) 1 c) -1 d) Infinity

Description : The reflection coefficient in the wave propagation when it is transmitted with the Brewster angle is a) 0 b) 1 c) -1 d) Infinity

Last Answer : a) 0

What will be the reflection coefficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ? (a) Zero (b) Unity (c) Infinity (d) None of the above

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Last Answer : (a) Zero

If Voltage Standing Wave Ratio, (VSWR) of a wave is 2, its reflection coefficient will be _____.

Description : If Voltage Standing Wave Ratio, (VSWR) of a wave is 2, its reflection coefficient will be _____.

Last Answer : If Voltage Standing Wave Ratio, (VSWR) of a wave is 2, its reflection coefficient will be 1/3.

The coefficient of reflection for current wave is

Description : The coefficient of reflection for current wave is

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If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-8 -Physics

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Last Answer : Ray NQ, as it has to be parallel to ray OS.

The distance between a convex lens and a plane mirror is 15 cm. The parallel rays incident on the convex lens, after reflection from the mirror, form

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Rainbows are produced when sunlight (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. (3) Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection. (4) None of the given statements is correct.

Description : Rainbows are produced when sunlight (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed ... atmosphere is dispersed after suffering reflection. (4) None of the given statements is correct.

Last Answer : (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. Explanation: When the light rays from the Sun are incident on water drops hanging in ... results in production of colour arcs which appear hanging in the sky and known as rainbow.

What do you call the reflection of a part of incident light at the interface of two media that have different refractive indices? A. Snell’s reflection B. Fresnel reflection C. Lambertian reflection D. Huygen’s reflection

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Rainbows are produced when sunlight : (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. (3) Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection. (4) None of the given statements is correct.

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Which wave cannot exist inside wave guide

Description : Which wave cannot exist inside wave guide  (A) TE (B) TM (C) TEM (D) HE

Last Answer : Which wave cannot exist inside wave guide TEM 

When a dominant mode wave guide not terminated in its characteristic impedance is excited with a 10 GHZ

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If a wave has frequency of 2 Hz, it has a period of ?

Last Answer :  If a wave has frequency of 2 Hz, it has a period of 1/2 s.

The current reflection coefficient of a line with voltage reflection coefficient of 0.65 is given by a) 0 b) 0.65 c) -0.65 d) 0.35

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Given that the reflection coefficient is 0.6. Find the SWR. a) 2 b) 4 c) 6 d) 8

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transmission line has reflection coefficient as one. (a) Open circuit (b) Short-circuit (e) Long (d) None of the above

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A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient?

Description : A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9 

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The reflection coefficient of a short-circuited line for voltage is:

Description : The reflection coefficient of a short-circuited line for voltage is: A) -1 B) +1 C) 0.5 D) zero

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For a battery with constant voltage, the reflection coefficient is

Description : For a battery with constant voltage, the reflection coefficient is (a) ∞ (b) – 1 (c) 1 (d) 0 

Last Answer : 0

A transmission line is terminated at its characteristic impedance. The reflection coefficient is

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The angle of incidence is equal to the angle of reflection for perfect reflection. State True/False. a) True b) False

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When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

Description : When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

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The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature

Description : The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature

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When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

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Last Answer :  is a bad conductor of heat so only inner surface expands 

what is the temperature coefficient of Resistance of conductor ?

Description : what is the temperature coefficient of Resistance of conductor ?

Last Answer : conductors have positive coefficient. means as the temperature increases resistance also increases.

The sinusoidal wave `y(x,t) = ym sin(kx-omegat)` is incident on the fixed end of a string at `x = L`. The reflected wave is given by :-

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Find the permittivity of the surface when a wave incident at an angle 60 is reflected by the surface at 45 in air. a) 1.41 b) 3.5 c) 2.2 d) 1.73

Description : Find the permittivity of the surface when a wave incident at an angle 60 is reflected by the surface at 45 in air. a) 1.41 b) 3.5 c) 2.2 d) 1.73

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According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2); (A) The angle of incidence is equal to the angle of refraction (B) The angle of refraction r) is given by sin i (C) Both (a) and (b) (D) Neither (a) nor (b)

Description : According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2); (A) The angle of incidence is equal to the angle of refraction (B) The angle of ... r) is given by sin i (C) Both (a) and (b) (D) Neither (a) nor (b)

Last Answer : Answer: Option B

In Fraunhofer diffraction, the incident wave front should be ….. A. elliptical B. Plane C. Spherical D. Cylindrical

Description : In Fraunhofer diffraction, the incident wave front should be ….. A. elliptical B. Plane C. Spherical D. Cylindrical

Last Answer : B. Plane

A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its

Description : A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is: (1) 0° (2) 30° (3) 45° (4) 60°

Last Answer : A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is:60°

A perfect conductor acts as a a) Perfect transmitter b) Perfect reflector c) Bad transmitter d) Bad reflector

Description : A perfect conductor acts as a a) Perfect transmitter b) Perfect reflector c) Bad transmitter d) Bad reflector

Last Answer : b) Perfect reflector

A perfect conductor has

Description : A perfect conductor has

Last Answer : A perfect conductor has infinite conductivity.

The blue colour of sky is due to – (1) reflection of sunlight (2) refraction of sunlight (3) scattering of shorter wave-lengths of sunlight in the atmosphere (4) scattering of longer wave-lengths of sunlight in the atmosphere

Description : The blue colour of sky is due to – (1) reflection of sunlight (2) refraction of sunlight (3) scattering of shorter wave-lengths of sunlight in the atmosphere (4) scattering of longer wave-lengths of sunlight in the atmosphere

Last Answer : (3) scattering of shorter wave-lengths of sunlight in the atmosphere Explanation: The blue colour of the sky is caused by the scattering of sunlight off the molecules of the atmosphere. This scattering, ... to the direction of the sun's light is predominantly in the blue end of the spectrum.

The blue colour of sky is due to – (1) reflection of sunlight (2) refraction of sunlight (3) scattering of shorter wave-lengths of sunlight in the atmosphere (4) scattering of longer wave-lengths of sunlight in the atmosphere

Description : The blue colour of sky is due to – (1) reflection of sunlight (2) refraction of sunlight (3) scattering of shorter wave-lengths of sunlight in the atmosphere (4) scattering of longer wave-lengths of sunlight in the atmosphere

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Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization

Description : Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization

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The colour of sky appears blue due to – (1) reflection (2) refraction (3) scattering of shorter wave lengths (4) dispersion

Description : The colour of sky appears blue due to – (1) reflection (2) refraction (3) scattering of shorter wave lengths (4) dispersion

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Which of the following phenomena is possible is free space medium? A. Reflection of radio wave B. Diffraction of radio wave C. Refraction of radio wave D. Attenuation of radio wave

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Last Answer : D. Attenuation of radio wave

The angle at which the wave must be transmitted in air media if the angle of reflection is 45 degree is a) 45 b) 30 c) 60 d) 90

Description : The angle at which the wave must be transmitted in air media if the angle of reflection is 45 degree is a) 45 b) 30 c) 60 d) 90

Last Answer : a) 45

Which one of the following statements is correct? (A) Snow albedo falls at all wave length with the increase of grain size (B) The effect of grain size on reflection is maximum in the near-IR region (C) The effect of grain size on reflection is low in the visible region of the spectrum (D) All of these

Description : Which one of the following statements is correct? (A) Snow albedo falls at all wave length with the increase of grain size (B) The effect of grain size on reflection is maximum in the near-IR ... effect of grain size on reflection is low in the visible region of the spectrum (D) All of these

Last Answer : Answer: Option D