English
Hindi

Question

Download Solution PDF

The velocity of electromagnetic waves in a dielectric medium with relative permittivity of 4 will

This question was previously asked in
SDSC ISRO Technical Assistant Electronics 8 April 2018 Official Paper
Download PDF Attempt in App
View all ISRO Technical Assistant Papers >
  1. 3 × 108 m/s
  2. 6 × 108 m/s
  3. 1.5 × 108 m/s
  4. 0.75 × 108 m/s

Answer (Detailed Solution Below)

Option 3 : 1.5 × 108 m/s
Free Tests
View all Free tests >
Free
ISRO Technical Assistant Mechanical Full Mock Test
80 Qs. 80 Marks 90 Mins
Start Now

Detailed Solution

Download Solution PDF

Concept:

The velocity (Vp) of a plane electromagnetic wave is given as-

Here, μ = μoμr

ε = εo εr

-----(1)

μ0 = permeability in free space 4π × 10-7 H/m

εo = permittivity in free space 8.854 × 10-12 C2/Nm2

Calculation:

Given:

μr = 4

From Equation (1):

vp = 1.5 x 108 m/sec

Download Solution PDF
Latest ISRO Technical Assistant Updates

Last updated on May 30, 2025

-> The ISRO Technical Assistant recruitment 2025 notification has been released at the official website. 

-> Candidates can apply for ISRO recruitment 2025 for Technical Assistant from June 4 to 18.

-> A total of 83 vacancies have been announced for the post of Technical Assistant.

-> The Selection process consists of a written test and a Skill test.

-> Candidates can also practice through ISRO Technical Assistant Electrical Test Series, ISRO Technical Assistant Electronics Test Series, and ISRO Technical Assistant Mechanical Test Series to improve their preparation and increase the chance of selection. 

Exams Tests Super Practice

More Parallel Plane Waveguide Questions

Q1.With the reduction in actual permittivity, the relative permittivity ______.
Q2.A metallic wave guide of square cross-section of side L is excited by an electromagnetic wave of wave-number k. The group velocity of the TE11 mode is
Q3.A positively charged particle is placed at the origin (with zero initial velocity) in the presence of a constant electric and a constant magnetic field along the positive z and x directions, respectively. At large times, the overall motion of the particle is adrift along the
Q4.Ten times change in frequency is known as:
Q5.The magnitude of (|E| / |H|) in a uniform plane wave is:
Q6.A rectangle waveguide of internal dimensions (a = 3 cm and b = 1 cm) is to be operated at TE11 mode. The minimum operating frequency is:
Q7.A standard air-filled rectangular waveguide with dimensions a = 8 cm, b = 4cm, operates at 3.4 GHz, For the dominant mode of wave propagation, the phase velocity of the signal is vp. The value (rounded off two decimal places) of vp / C, where C denotes the velocity of light, is _____
Q8.As the wave frequency approaches to cut-off frequency of wave guide, the correct statement is:
Q9.Transverse Electro-magnetic waves are characterized by

More Waveguides and Guided Waves Questions

Q1.A rectangular waveguide has dimensions 1 cm × 0.5 cm. Its cut off frequency is : 
Q2.__________ number of 3-dB couplers are needed for a 64 × 64 bi-directional star coupler. 
Q3.The core refractive index and a relative refractive index difference of a multimode step-index fiber are specified as 1.5 and 2%, respectively. At operating wavelength of 1300 nm, the approximate number of propagating modes is 1000. The diameter of the fiber core is :
Q4.The maximum digital transmission rates for unipolar return-to-zero data transmissions over an optical fiber 10-km long with specified pulse-spreading constant of 10 ns/km is : 
Q5.With the reduction in actual permittivity, the relative permittivity ______.
Q6.Which of the following modes has the solution of Hz = 0, but Ez ≠ 0?  
Q7.A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1  Ω /m. If the line is distortionless, the attenuation constant is 
Q8.In which of the following are the optical fibers commonly used ?
Q9.The wavelength of a signal propagating in a waveguide is always _______ its free space wavelength.
Q10.In optical fibers, following statements are given: (A) \(\rm\frac{1}{v_s} = −\frac{λ^2}{2 \pi c} \frac{d b}{d λ}\) (B) vg = \(\rm −\frac{λ^2}{2 \pi c}\)dβ/dλ (C) D = \(\rm −\frac{2 \pi c}{\pi^2}\)β2 (D) β2 = \(\rm −\frac{2 \pi c}{\pi^2}\) . D (E) Material dispersion is a function of (λ) wavelength Choose the correct answer from the options given below:
Suggested Test Series
View All >
ISRO Technical Assistant 2024 Mock Test
97 Total Tests with 2 Free Tests
Start Free Test
AE & JE Mechanical Engg. Exams Previous Year Papers Mock Test
178 Total Tests with   4 Free Tests
Start Free Test

UPPCL JE Important Links

ResultCut offSalary and Job ProfileAdmit CardExam PatternSyllabus

More Electromagnetic Theory Questions

Q1.In a magnetic circuit, if the reluctance of a path increases, which of the following occurs?
Q2.Which of the following is true about microwaves in unguided media?
Q3.Why does magnetic fringing occur at the ends of a magnetic circuit?
Q4.According to Laplace's Law of Magnetic Circuits, the magnetic field strength H in a core is directly proportional to the magnetomotive force (MMF) and inversely proportional to the length of the magnetic path. If the MMF is increased by a factor of 2, and the length of the magnetic path is halved, what will be the change in the magnetic field strength H?
Q5.Which factor is primarily responsible for distortion in a transmitted signal?
Q6.In a series magnetic circuit, if the reluctance of one path increases, what will happen to the total magnetic flux in the circuit?
Q7.The magnetic field outside a toroidal coil:
Q8.The magnetic field inside a solenoid is:
Q9.Force on a current-carrying conductor will be _________ when it is placed at right angles to the direction of the magnetic field.
Q10.In a series magnetic circuit, ___________ flux φ flows through each part of the circuit.
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
support@testbook.com
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Hot Links： teen patti win teen patti star login teen patti real teen patti game