Problem 2 In this problem we study the homogeneous linear 2nd order equation

(a)State four properties of an ideal operational amplifier. In each case explain the significance of the property to the practical operational amplifiers. (b)Consider the following Op Amp circuit in Figure 4.1. i)Identify the type of this basic operational amplifier circuit. ji)Calculate the gain of this amplifier. iii)Calculate the value of RF if the Ri is 1KOHMS to give a gain of 10. The following signal shown in Figure 4.2 is then applied to VIN in Figure 4.1.Sketch the output waveform (VOUT) for the Op Amp design in question number (iii). (Assume supply voltage is ±15V)

In the circuit below, Vi = 10 Volts. Answer the following questions: Find the value of l1. Find the value of l2. ] Find the value of l3. Find the power of the upper resistance 5 Ohms.

(4) The figure below shows a four-lead bridge circuit commonly found in oil & gas field instruments; R.is the resistance of the leads or cables connecting the sensor to the bridge circuit. Show that ETh = Vs(Ro/R3)aT, i.e., the bridge output voltage is unaffected by changes in Rc.

3. Whenever possible, the components are labeled from __________to_______and from _____to______on a ladder diagram. a. top b. bottom c. left d. right

The Thyrist or shown in the circuit below is triggered on by a gate current of 1.8 mA and a forward break over voltage of 170 V corresponding to this gate current. The applied AC voltage is 240 V (Peak), load resistance Lp is 100 ohms and holding current is zero. Determine: (a) firing angle(b) conduction angle(c) average load power.

What is the electric field? What are the bound charges (surface and volume) of the dielectric sphere?

3. Explain the benefits of testing transformer by indirect methods, such as open circuit and short circuit tests.

Task 4.1 - Calculate basic electrical parameters in D.C. circuits using electrical circuit theory A) What is the current when a charge of: a) 3.0C passes through a lamp in 20s? b) 3600C passes a point in 3.0 minutes? c) 0.2μC flows through a diode in 2.0ms? B) A charge of 4000μC passes each point in a wire in 50s. Calculate: a) The charge in coulombs b) The current in the wire c) The number of electrons per second passing each point in the wire (Electron charge = 1.6 x 10-1°C) C) a) What is the pd across a wire of resistance 8.00 when there is a current of 1.5A through it? b) What is the resistance of a wire if a p.d of 6.0V drives a current of 0.25A through it? c) A p.d of 3.0V is applied across a 150 resistor, what is the current? D) a) What is the power of a microwave oven that takes a current of 7.5A from a 230V supply? b) A small 48W electric heater is connected to a 12 V supply, calculate the current. c) When it is hot an electric bar fire has a resistance of 500. What is the power rating? E) A lamp has a p.d of 12V across it. Calculate how much electrical energy is transferred when a) A charge of 400C passes through it. b) A current of 2.5A passes through it for 30s. F) A vacuum cleaner has a rating of 460W on the 230V mains, what fuse should be fitted?

Experiment 1: Strain Gauge Measurement Objective: This laboratory exercise is used to investigate the characteristics of strain gauges. A strain gauge is a device whose electrical resistance varies in proportion to the amount of strain in the device. The most widely used gauge is the bonded metallic strain gauge. Strain gauges can be a vital tool in determining the loads, stresses, and strains of structures. Upon successful completion of the experiment you should be able: 1. To become acquainted with applying strain gauges and their use in measurements. 2. To perform a static calibration of a cantilevered beam for use as a force transducer. 3. To identify the relationship between the displacement at the end of a beam and the strain at the gauge location to allow for a correlation between displacement and strain.