Electromagnetic...

If ‘C’ is a closed curve enclosing a surface S, then the magnetic field intensity H, the current density J, and the electric flux density D are related by:

In a transmission line, the adjacent maxima are found at 12.5 cm and 37.5 cm. The operating frequency

An infinite plane dielectric slab of thickness d and having permittivity ϵ = 4 ϵ₀ occupies the region 0 < z < d. If a uniform electric field E = E₀ a_z is applied in free space, then which of the following statements is/are true?

An electromagnetic wave is propagating in certain nonmagnetic material such that the magnetic field intensity at any point is given by:

H = 3 cos (10⁹ t – 5z) a_x A / m

For a wave propagating in an air-filled rectangular waveguide:

A receiving antenna is located 100 m away from the transmitting antenna, has an effective area of 10 m². The electric field strength at the antenna is 2 mV/m

The power received by the antenna is ______ nW.

In air, a propagating wave has electric field intensity given by:

E = 9 cos (4 × 10⁸ t - βx) a_z V / m

In a losses transmission line, the velocity of propagation is 2.5 × 10⁸ m/s. The capacitance of the line is 30 pF/m. The characteristics Impedance of the line is _____ ohms. (upto 2 decimals)

An air-filled rectangular waveguide R₁ is operating at the frequency 2 GHz and another air-filled rectangular waveguide R₂ is operating at 4 GHz. The guide wavelengths of these waveguides at their respective frequencies are equal. If the cut-off frequency of waveguide R₁ is 1 GHz, what is the cut-off frequency of the waveguide R₂ in GHz?

An Aluminium chamber is to be designed that attenuates a 1 MHz signal at its outside by a factor of 10⁶. If the conductivity of Aluminium is 3.5 × 10⁷ S/m and there is no reflection of plane EM wave at the outer surface of Aluminium, then the minimum thickness of Aluminium chamber required is _________ mm.

A uniform plane wave in region 1 is normally incident on the planner boundary separating regions 1 and 2. Both regions are lossless and ${ϵ}_{r1}={\mu }_{r1}^3$, ${ϵ}_{r2}={\mu }_{r2}^3$. If 20% of the energy in the incident wave is reflected at the boundary, the ratio ε_r2 / ε_r1 can take the value:

Two half-wave dipole antennas are operating at 100 MHz and separated by 1 km. If 80 W is transmitted by one, the power received by other is _____ μW.

A 1 mW optical signal is fed into an optical fibre having loss factor of 1.41 dB/km. The distance after which the power of signal is reduce to 0.5 mW is _________ km.

Consider a transmission line having a characteristic impedance of 100 Ω and connected to a 50 Ω resistance load. The line is very long, and the voltage measured at the load has a magnitude of 50 V. The maximum voltage that appears on the line is:

Two microwave signals having frequency 13 GHz and 18 GHz are transmitted through an dielectric filled waveguide (ε_r = 4) operating at TM₂₁ mode. If the waveguide is 200 m long and dimension 2.5 cm × 1 cm, the time delay between two signals at the other end of waveguide is ________ ns.