Description : Two 220 volt lamps, one of 60 watt and the other of 75 watt are connected in series across a 440 volt supply. The potential difference across 60 watt lamp will be: A) 195 volt B) 220 volt C) 245 volt D) 440 volt
Last Answer : Two 220 volt lamps, one of 60 watt and the other of 75 watt are connected in series across a 440 volt supply. The potential difference across 60 watt lamp will be: 245 volt
Description : Two 100 watt light bulbs are connected in parallel across a 100 volt power supply. The total power developed in the circuit is _______________. A. 200 watts B. 100 watts C. 50 watts D. equal to the product of the amperes times the voltage in each branch
Last Answer : Answer: A
Description : Which of the following statements is true if a 100 watt lamp and a 75 watt lamp are connected in parallel across a 100 volt power supply? A. The 75 watt lamp will draw as much current as the 100 ... Current flow will be the same across each lamp. D. The 75 watt lamp will have a higher resistance.
Last Answer : Answer: D
Description : Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains? a. 40 W bulb b. 60 W blub c. 100 W blub d. all will burn equally brightly
Last Answer : a. 40 W bulb
Last Answer : There are three 100 bulbs in parallel across 220 V.50 Hz line. If one bulb burns out: Remaining two bulbs will produce light.
Description : Used normally, a 150-watt, 120 volt light bulb requires how many amps of current?
Last Answer : ANSWER: 1.25 AMPS
Description : Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power dissipated is
Last Answer : Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power ... B. 160 W C. `37.5 W` D. 60 W
Last Answer : Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power ... `37.5` W B. 75W C. 80W D. 40 W
Description : If the voltage supplied to the lighting circuit is 110 volts, how much current is used by a 100 watt light bulb? A. 0.08 amps B. 0.91 amps C. 1.10 amps D. 90.9 amps
Last Answer : Answer: B
Description : An LED is operated on a 12 volt automobile circuit. The voltage drop across the LED is 2 volts and the current must be limited to 50 milliamps to prevent its overheating and destruction. What size resistor must be used? w) 60 ohms x) 100 ohms y) 120 ohms z) 200 ohms
Last Answer : ANSWER: Z -- 200 OHMS
Description : Rated power of a bulb at V voltage is P. Now, same voltage V is applied in all conditions mentioned in Column I. Match this Column I with Column II in
Last Answer : Rated power of a bulb at V voltage is P. Now, same voltage V is applied in all conditions ... Column II in which actual total power consumed is given.
Description : According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in _____. A. 1 Hour B. 5 Hours C. 8 Hours D. 10 Hours
Last Answer : ANSWER: D
Description : According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in-----? A. 2 hours B. 5 hours C. 8 hours D. 10 hours (Answer)
Last Answer : D. 10 hours (Answer)
Description : According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in------? A. 1 hours B. 5 hours C. 10 hours (Answer) D. 15 hours
Last Answer : C. 10 hours (Answer)
Description : What current is required to light two 75 watt lamps and one 40 watt lamp when connected in series to a 120 volt power source? A. 0.161 amperes B. 0.631 amperes C. 1.583 amperes D. 6.199 amperes
Last Answer : Answer: C
Description : Can you damage your eyes if you look directly at a lit 100 watt bulb?
Last Answer : It all depends on how far away you are, and how much ambient light there is already, But no, even holding your face eight inches away in a dark room won’t do any significant damage. Your pupils will contract so no damage is done.
Description : How much energy does it take to run a 100 watt light bulb for 24 hours?
Last Answer : It is usually measured in kilowatt hours. 100 watt bulb X 24 hours= 2400 watts or 2.4 kilowatt hours.
Description : Is the filament resistance lower or higher in a 500 watt light bulb than in a 100 watt light? Assume that both bulbs have been designed to operate at 110 volts.
Last Answer : ANSWER: LOWER
Description : A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?
Last Answer : ANSWER: 10 CENTS
Description : How much energy in consumed if a 100 watt light bulb is operated for 10 MINUTES?
Last Answer : ANSWER: 60,000 JOULES or 60kJ or 6X104J
Description : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy? (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above
Last Answer : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy? (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above
Description : A 100-watt light bulb turned on for 8 hours uses : (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above
Last Answer : A 100-watt light bulb turned on for 8 hours uses : (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above
Description : A 40 kW engine has a mechanical efficiency of 80 %. If the frictional power is assumed to be constant with load, what is the approximate value of the mechanical efficiency at 50 % of the rated load? (a) 45% (b) 55 % (c) 65% (d) 75%
Last Answer : Ans :c
Description : If the line voltage to the controller shown in the illustration is 440 volts, what is applied across the control circuit? EL-0080 A. 110 volts B. 220 volts C. 440 volts D. 660 volts
Description : If the line voltage to the controller shown in the illustration is 440 volts, what voltage is applied across the motor when contacts 'S' close? EL-0080 A. 110 volts B. 220 volts C. 440 volts D. 660 volts
Description : For transmission of power over a distance of 500 km, the transmission voltage should be in the range (a) 150 to 220 kV (b) 100 to 120 kV (c) 60 to 100 kV (d) 20 to 50 kV
Last Answer : (a) 150 to 220 kV
Description : An oil fired boiler is retrofitted to fire coconut shell chips. Boiler thermal efficiency drops from 82% to 70%. What will be the percentage change in energy consumption to generate the same output a) 12% increase b) 14.6% increase c) 17.1% decrease d) 17.1% increase
Last Answer : d) 17.1% increase
Description : Stuck my 110 volt computer into 220 volt! Did only the PSU burn?
Last Answer : I would think probably only the PSU. If any of your components are fried, the PSU was probs designed badly.
Description : Can you buy a refrigerator that uses 220 volt electricity?
Last Answer : General Electric makes and sells refrigerators that use 220 volt electricity. They are manufactured for use overseas, but are sold in the US as well.
Description : How much money you save with 220 volt Air Conditioners instead of 110 volt?
Last Answer : It wont save you much at all this is more the type of wiring used. [email protected]
Description : [23] Transformers are rated in KVA instead of KW because A. load power factor is often not known B. KVA is fixed whereas KW depends on load power factor C. Total transformer loss depends on volt ampere D. It has become customary
Last Answer : C. Total transformer loss depends on volt ampere
Description : Which of the following is not a unit of energy? a.Joule b.kW c.N-m d.Electron volt e.Watt-hour
Last Answer : b. kW
Description : What wire size needed for 120 volt 3000 watt load?
Last Answer : AWG # 10 wire on 30 amp circuit.
Description : What is the amp draw for a 3800 watt 240 volt water heater?
Last Answer : What is the answer ?
Description : The unit of electrical resistance is the _____________. A. ampere B. volt C. watt D. ohm
Description : Electric current is the flow of electrons through a conductor. The rate of this flow is measured as ___________. A. volts/watt B. amperes/centimetre C. coulombs/second D. ohms/volt
Description : Name the quantities which are measured by the following units. (i) Newton (ii) Joule (iii) Watt (iv) Volt (v) Light year (vi) Angstrom (vii) Acre-foot (viii) Becquerel (ix) Hertz (x) Cusec
Last Answer : Answers: (i) Force (ii) Work Energy (iii) Power of electricity (iv) Potential difference (v) Distance of stars and planets (vi) Length (vii) Volume (viii) Radioactivity (ix) Frequency (x) Rate of flow of water
Description : What is the unit of responsitivity? ∙ a. Ampere/volt ∙ b. Ampere/watt ∙ c. Watt/ampere ∙ d. Volts/ampere
Last Answer : ∙ a. Ampere/volt
Description : How much current does a 1500 Watt heater draw if supplied with a 120 Volt source?
Last Answer : ANSWER: 12.5 AMPS
Last Answer : Difference between watt and volt and ampere is as follows: Watt Volt Ampere Watt is the unit of power. Volt is the unit of voltage. Ampere is the unit of current. Watts= Volts x Amperes Volts= Watts/ ...
Description : A 24 volt battery supplies three devices wired in parallel that each have a resistance of 9 ohms. What is the voltage drop across each device?
Last Answer : A simple circuit has three resistors connected in series. The resistors are 14 ohms 12 ohms and 9 ohms. What is the total resistance of the circuit?
Description : Figure 'D' of the diagram shown in the illustration has a turns ratio of four to one. If a three-phase 440 volt supply is connected to terminals 'A-B-C', what voltage should develop across terminals 'a-b-c'? EL-0084 A. 64 volts B. 110 volts C. 190 volts D. 762 volts
Description : Figure 'C' of the diagram shown in the illustration has a turns ratio of four to one. If a three-phase 440 volt supply is connected to terminals 'A-B-C', what voltage should develop across terminals 'a-b-c'? EL-0084 A. 64 volts B. 110 volts C. 190 volts D. 762 volts
Description : Figure 'B' of the diagram shown in the illustration has a turns ratio of four to one. If a three-phase 440 volt supply is connected to terminals 'A-B-C', what voltage should develop across terminals 'a-b-c'? EL-0084 A. 64 volts B. 110 volts C. 190 volts D. 762 volts
Description : Figure 'A' of the diagram shown in the illustration has a turns ratio of four to one. If a three-phase 440 volt supply is connected to terminals 'A-B-C', what voltage should develop across terminals 'a-b-c'? EL-0084 A. 64 volts B. 110 volts C. 190 volts D. 762 volts
Description : When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage ... sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm
Description : When using Kirchhoff’s voltage law, how are voltage polarities assigned to the voltage drops across resistors?
Last Answer : The point at which current enters the resistor is assigned a negative polarity and the point at which current leaves the resistor is
Description : A potential difference of V = 100 ± 2 volt, when applied across a resistance R gives a current of 10 ± 0.5 ampere.
Last Answer : A potential difference of V = 100 2 volt, when applied across a resistance R gives a current of 10 ... percentage error in R given by R = V/I.
Description : An electrical component is connected across a 120 volt 60 hertz AC supply. What is the current drawn by the component if the impedance is 200 ohms? A. 0.01 amperes B. 0.60 amperes C. 1.67 amperes D. 100 amperes