You have been hired by a homework to install a celling fan and light kit in a leaving room.The living room luminaire(light fixture) being used at present contains two 60-W lamps. After locating the circuit in the panel box, you find that the circuit is protected by 15-A circuit breaker and is run with 15 AWG copper wire. After turning on all lights connected to this circuit, you have a current draw of 8.6 A and a voltage of 120 V. The celling dan light kit contains four 60-W lapms, and the fan has a maximum current draw of 1.6 A. Can this fan be connected to the existing living room circuit? Recall that a continuous-use circuit should not be loaded to more than 80% of its rated capacity.

The circuit diagram below is for a robot that walks around the room. It is designed to stop walking when certain conditions are met.   a) In which of the following cases will the robot start walking? i. The robot is far from the wall. ii. The battery status is good. iii. The room lights are on. iv. Both i and ii. v. i, ii, and iii. vi. ii and iii, but not i. vii. i and iii, but not ii.  b) Explain what happens to the robot if the light is turned off. ______________________________________________________________________________ ______________________________________________________________________________  c) If you remove the light sensor and the AND gate attached to it from the circuit from the circuit, which of the following are true and which are false? i. The robot will continue to walk with a low battery ii. The robot will stop walking if it is close to the wall iii. One of the remaining inputs (proximity sensor and battery status) is irrelevant to whether the robot walks or not.…

A circuit consist of four 100W lamps connected in parallel across a 230V supply. Inadvertently, a voltmeter has been connected in series with the lamps. The resistance of the voltmeter is 1500Ω and that of the lamps under the conditions stated is six times their value when burning normally. What will be the reading of the voltmeter?

You are handed a black box containing a circuit with two terminals marked a and b. With nothing else connected across the terminals, you measure the voltage across terminals a and b to be 15 volts. When you connect a resistor across the terminals, the external resistor draws 90 watts and the terminal voltage drops to 12 volts. It is desired to find the Thevenin equivalent of the black box circuit across its terminals a and b, without the external resistor.   What is the Thevenin voltage, thevenin resistance, and the resistance of the external resistor?

If you use an extension cord, current travels from the 120 V outlet, along one wire inside the cord, through the appliance you’ve plugged into the cord, and back to the outlet through a second wire in the cord. The total resistance of the two wires in a light-duty extension cord is 0.40 Ω; the current through such a cord should be limited to 13 A. If a 13 A shop vacuum is powered using this cord,a. What is the voltage drop across the vacuum?b. How much power does the vacuum use?c. How much power is dissipated in the cord?

QUESTION 1) In the circuit below, a voltmeter with a sensitivity of 2kohm/V is used to measure the voltage at the ends of the R2 resistor. a) Calculate the voltage at the ends of resistor R2 when the voltmeter is not connected to the circuit.  b) Find the voltage and relative error value at the ends of resistor R2 when the voltmeter is at 5V level.  c) When the voltmeter is at 2.5V level, find the voltage and relative error value at the ends of resistor R2.

You are an electrician on the job. The electrical blueprint shows that eight 500-W lamps are to be installed on the same circuit. The circuit voltage is 277 V and is protected by a 20-A circuit breaker. Assuming that the load is continuous, is a 20-A circuit large enough to carry this load?

INSTRUCTIONS: Solve the following problems. Show and COMPLETE solutions. Draw all CIRCUIT DIAGRAMS or the equivalent circuit (dummy circuit) as the case may be.  Three resistors, 11 ohm, 7ohm, 20 ohm are connected in parallel. If placed in a circuit with a 12-volt power supply. Determine the equivalent resistance, the total circuit current, and the voltage drop across and current in each resistor, the total power supplied to the circuit.

Write at least 10 safety measures in circuit connection at home. Give a short explanation each.