There is a dielectric sphere with radius a [m] and relative permittivity εr. This dielectric has a uniform charge density ρ
[C / m3)
This dielectric sphere has an inner radius b [m] (a <b).
It shall be surrounded by a hollow grounded conductor. The center of the dielectric sphere
Answer the following questions as if the centers are the same.
(1) Find the electric flux density and electric field at each location.
(2) Find the energy density stored in each place.
(3) Find the total energy stored inside the conductor.
(4) Find the force acting on the surface area of the conductor.

CHAPTER 13: DISCRETE-TIME SIGNAL (TEXTBOOK SIGNALS AND SYSTEM BY MAHMOOD NAHVI)

12. In an LTI system, x(n) is the input and h(n) is the unit-sample response. Find and sketch the
output y(n) for the following cases:
i) x(n) = 2[u(n) - u(n - 11)] and h(n) = 0.5nu(n)
ii) x(n) = 2[u(n) - u(n - 11)] and h(n) = (-0.5)nu(n)
iii) x(n) = u(n) - u(n - 5) and h(n) = 0.5|n|u(n)
iv) x(n) = u(n) - u(n - 5) and h(n) = (-0.5)|n|u(n)

When electrical leakage occurs in a circuit, which of the following protective device will NOT Trip?

A. RCBO

B. MCB

C. RCD

D. All of the above

When i went to the lab, and measure the output voltage of the VOLTAGE REGULATORS in the Arduino Uno by connecting it to either 12 voltage or 9 voltage, The output was the same which is 4.94.

I need the equation to calculate and calculate it with full steps mathematically

An 8-bit A/D Converter on a chip using 0.18um technology with a Vdd=1.8V is built using minimum size transistors (l=0.18um and w=0.36um). It has 22 transistors per bit in conversion and 128 transistors used for memory. The activity factor in the conversion modules is 0.1, while the activity factor in the memory blocks is 0.02. Assume each transistor contributes 3fF/um of gate capacitance and 0.24fF/um of diffusion capacitance. Estimate the switching power without capacitance when operating at 1MHz.

Q1A 4-poles, wave wound, 600 conductors DC long shunt generator has the armature, series and shunt resistances are 0.15 ohm, 0.18 ohm and 200 ohm respectively. It runs at 1500 rpm. Calculate the following if it is required supply to the load resistance of 20ohm with flux per pole as 8.33 mWb. Take the Iron and Frictional losses as 550 W.(i)Induced Emf(ii)Terminal Voltage(iii)Output Power(iv)Input Power(v)Efficiency

Q2Write short notes on following characteristics of dc generator(i) Open Circuit Characteristics (OCC)(ii) Load Characteristics

Q3A dc short shunt generator supply 500V to a 20 kW load. Its armature, series and shunt resistance are 0.8 , 0.6 and 700 respectively. Calculate the armature current, induced emf, input power, torque supplied by the prime mover and efficiency if its speed and mechanical losses are 1500 rpm and 910W respectively.

Q4A 500V, 4 poles, wave-wound DC Series Motor has 900 conductors on its armature. It has armature and series field resistance of 0.6, and 0.8respectively. The motor takes a current of 40A. Estimate the speed and gross Torque developed if it has a flux per pole of 20mWb.

Q5A dc shunt motor takes a no load current of 5 A at 300V. Its armature and shunt resistances are 0.45 ohm and 0.68 ohm respectively. Calculate the Constant Loss (Iron and Frictional Loss) of the machine.

Q6A dc series motor operates at 1000 rpm with a line current of 82A from 250V mains. its armature circuit resistance is 0.2and its field resistance is 0.6. Find the speed at which the motor runs at a line current of 65A, assuming that the flux at this current is 33% of the flux at 82A.

Q7A 3 phase, 50Hz, 4 poles induction motor runs at 1440 rpm. Calculate the following i.Synchronous speedii.Slipiii.Slip speediv.Rotor frequency while runningv.Rotor cu loss if mechanical power developed is 16 kW.

Q8A 40 kW (Rated Output), 415V, 50Hz, 3 phase, star connected induction motor has a synchronous speed of 1800 rpm. The full load slip is 4% and full load power factor is 0.9 lagging. Stator Cu losses are 2500 W. Iron losses are 2000W. Rotational losses are 1400 W. Calculate i.Shaft or Net Torque developedii.Mechanical power developediii.Power inputiv.Efficiencyv.Supply current

Q9The following are the equivalent circuit parameters of a 3phase, star connected 415V, 50Hz, 4 poles Induction Motor:R1= 0.5, R'2= 0.4/s , X1= 0.9, X'2= 0.8, Xm= 50,(neglect Ro)Calculate the input impedance, motor current, power input, power supplied to the rotor, power developed and efficiency if its rotational losses are 1200W. It runs at 1410 rpm.

Q10A 415-V, 29.84 kW, 50 Hz, delta-connected 3-phase induction motor gave the following test data:No load test:415V, 15A, 2000 WLocked rotor test:125V, 40A, 4000 WConstruct the circle diagram and determine the line current and power factor for the rated output. Assume stator and rotor Cu losses equal at standstill.Q11With a aid of neat circuit diagram, explain the working principle of Automatic star-delta starter of three phase induction motor

Three Phase Problems

Q1: What are concepts you need to understand for three phase problems?

Q2: When there is two connections, such as Y to Y. Is there a connection of circuit? For example one end of the y connection connected to the other. Will that make

impedance parallel for y connection?

Lab report on **resistor**
Should have Profile or definition and simple steps to analyze the electrical circuit through the resistor and example.
#Please write clearly or work on word.

Consider a Si NPN BJT. Discuss how an change in one of the design parameters affect the emitter injection efficiency, the base transport factor, the common emmiter current gain, and the early voltage. Assume complete ionization. Further assume the carrier mobility and the minority carrier lifetime are independent of the change in design parameters.

(a) Increase emitter doping
(b) Increase base doping
(c) Increase base width
(d) Increase collector doping

Give three features of the differential pair circuit in IC analog design

Determine the Field Enhancement Factor (FEF) for the following dimensions.

A) Cylinder Plane, d=3cm, x=12cm

B) Sphere Plane, d=2cm, x=8cm