An opaque surface, by 2 m, Is malhtalhed at K and is exposed to solar irradiation with G = 1200 W/m2. The surface is diffuse and its spectral absorptivity is al = 0 0< A < 0.5 um = 0.8 0.5 um 2.0 um Determine the absorbed radiation, the emissive power and the net radiation heat transfer.

Q: A flashlight beam has an exit power of 100mW, an exit diameter of 3.8cm, and a divergence of 1.1…

A: Given, A flashlight beam has an, Exit power = 100mW, Exit diameter = 3.8 cm, Divergence = 1.1 degree…

Q: Two parallel plate capacitors are initially charged to q,=2q and q2=8q . Capacitor C; = 5C and C2=…

A: Calculate the total charge on both the capacitor. QT=q1+q2=2q+8q=10q

Q: A dielectric slab of Teflon ( x=2.1 is inserted between the plates of a parallel-plate capacitor…

A: In the question, Dialectic slab = 2.1  Parallel plat A= 2.3cm2   Separation distance d= 0.03cm Find…

Q: A 44 ?F capacitor with no dielectric has an E-field of 56 kV/mm between the plates. The voltage…

A:

Q: What is the capacitive reactance at 4 MHz for a 10 nF capacitor?

A:

Q: An ACSR conductor has internal inductance 0.05 mH/Km for µr = 1. If his ACSR is replaced with…

A: Given an ACSR conductor has, Internal inductance, Lint1=0.05 mHkm. At relative permeability, μr1=1.…

Q: A parallel plate capacitor has a cross-sectional area of 49.4 x 31.8 mm and a plate separation of…

A: Parallel plate capacitor, A= 49.4×31.88 mm d= 0.12 mm (dielectric constant)εr=7.1

Q: 3. Two circular metal plates of radius 0.610 m and thickness 7.10 mm are used in a parallel plate…

A: Given, Radius, r=0.610 m Gap between plates, d=2.10 mm Half of space between plates is filled with…

Q: A ceramic capacitor has a value of C=10,000 pF.  The capacitor consists of a dielectric disc between…

A: capacitor c = 10000 pF relative permittivity εr = 40  voltage V = 100 V diameter d = 1 cm

Q: what value of capacitance is required to produce 50V of reactance at 450 MHz

A:

Q: Calculate Po 300K when the Fermi energy is 0.35 eV above the valence energy band. for silicon at T =…

A:

Q: Find the charge q(t) on the capacitor and the current i(t) in the given LRC-series circuit. 1 L = =…

A:

Q: What is the average power dissipated in a 17 mH inductor when a v = 5sin330t voltage is applied…

A:

Q: What is the reactance of a 50.55 mH inductor when it is subjected to an ac signal of frequency 50…

A: The reactance of an inductor of inductance L H can be expressed as In this case, the values of the…

Q: Q27 b) Find the equivalent Inductance between 'a' and 'b'. L1= 15 mH, L2 = 55 mH, Ly= 45 mH, L4 = 15…

A:

Q: A ceramic capacitor has a value of C=10,000 pF. The capacitor consists of a dielectric disc between…

A:

Q: . For what range of K's is this system stable? K H(2)- 1+ K z-0.9

A: Solution is as follows

Antenna Characteristics

The antenna is an important concept in the domain of electronics and communication engineering. An antenna forms an integral part of many commonly used devices such as wireless modems, routers, game controllers, mobile phones, bluetooth devices, and so on. In simple terms, any wireless communication makes use of antennas to serve the purpose. An antenna, also known by the term 'arial', is an electrical device that converts electrical signals into electromagnetic waves or electromagnetic waves into electrical signals. An antenna contains a transmission line usually made up of co-axial cable, it then receives the signals and converts them into electromagnetic waves, which are then transmitted via space into their required destination. A communication system essentially makes use of two antennas, a transmission antenna, which converts electrical signals into electromagnetic waves, and a receiving antenna, which receives the electromagnetic waves and converts them back into electrical signals.