B. Consider the circuits shown in Fig. 1 and Fig. 2. Assume that you have the meter readings, that they are free of error, and that you have the characteristics of each meter. 1. Derive a formula for calculating the true value of Rx, in terms of Rv and RA, for the circuit of Fig. 1. 2. Do the same for Fig. 2. 10 v FIG. 2 + Rx A ww V

1. Convert 3.24kW-Hr to (a) BTU per hour (c) Cal. per sec (b) N.m (d) kJ 2. The voltage across any part of a circuit is equal to the resistance in Ohms. of the current in amperes and the 3. In a series circuit the current is the. equal to the in any part of the circuit and the total emf (source) is of the voltages across each resistor 4. System efficiency when maximum power is transferred or delivered is , i.e. power output to power losses. (а) 60%. (c) 50%. (b) 150%. (d) 200%. 5. In parallel circuit the emf across each resistor is the of all branch currents and the total current is equal to the 6. Express 3,600,000 kJoules to (а) BTU (b) Calories 7. Ohm's Law states that, for a steady current, the current in a circuit is total emf acting in the circuit and is proportional to the proportional to the total resistance. 8. is the rate of doing work, or rate of expenditure of energy, and its unit is

Good day, sir/ma'am.   Question: A battery has an emf of 14 V and internal resistance of 0.08 ohms. Its terminals are connected to a load resistance of 3.00 ohms. a.) Find the terminal voltage of the battery. b.) Calculate the power delivered to the load resistor and the power to the internal resistance of the battery.   Thank you.

In Multisim (or any other circuit drawing software) design a monitoring system to detect proximity of an object, using a Reed switch and transistors.  An LED or a light can be used as an indicator; when two objects are in close proximity of each other an LED will lit. Then design should use a relay to switch on a siren.  Use a 12 VDC relay (included in your component bag) with sufficient power rating for the contacts to turn on the siren. When the input voltage of the relay is close to 12V, the siren will sound and if the relay input is close to 0V the siren will go off. For the low sound volume, design an amplifier to amplify the output of the siren by a factor of 10. Assume that you can remove the speaker of the siren and place a transistor/Opamp amplifier between the siren circuit output and the 8Ω/2Wspeaker. Design the amplifier and specify your valid assumptions.

i. Analyze the working of digital voltmeter when it is measuring a voltage of 5V with a neat sketch of the mentioned. ii. In Al Ahmadi distribution station, a voltmeter of range (0-600V) and ammeter of range (0-15A) are used to measure a line voltage of 33kV and current of 1000A. While measuring on one day voltmeter reads 150 V and ammeter reads 7.2 A respectively, then estimate the following. (Use sample values for winding turns) i. Total (Actual) line Voltage in the substation ii. Total current in the substation

Power is supplied to a load resistor R from a three-phase zero-impedance supply of balanced sinusoidal voltages using half-wave bridge circuit of Fig.2. The three diodes may be considered as ideal switches. (a) Sketch the phase current waveform i.(ot) in phase-a with respect to the phase voltage Van(t)-Vm sinot. (b) Show that the rms value of the phase current is: la = 0.485- R Hence, calculate I, of the phase current, compare with the value for sinusoidal operation. (c) Sketch the load current waveform and specify, by observation, the lowest ripple frequency. mo DI ✈ D2 . D3 Z. # R - % + io Fig.2

A voltmeter having sensitivity of 200 ohm/volt reads 119 V on its scale of 219 V when connected across an unknown resistance in series with a multimeter. When the multimeter rads 5mA, calculate the error due to the loading effect of voltmeter. Also calculate the error if the milliammeter reads 800mA and voltmeter reads 40V on its 219 V scale.

Q.1. A power suppply having 220 V AC input and two fixed outputs as 10 V DC and 20 V DC is requested from you. For this purpose, a transformer with 220 V AC input / 15 V AC output, some capacitors, some silicon diodes, and zener diodes are presented.a) Design your power supply and point out DC voltage outputs b) Explain the operation of the network and all the components used in the design .c) Calculate and plot input and output signals of the network.Hint: For design, remember clipper, clamper, rectifier,voltage multiplier and zener circuits

طشنياذحسخذزسوس

Find the Vout Value of the circuit below during the: negative half cycle, positive half cycle.