Physics Current Electricity Level: Misc Level
What is the total resistance of a parallel circuit that has three branches with resistance of 2 ohms, 2.5 ohms,, and 4 ohms?
8.5 ohms, 1.15 ohms, 2.83 ohms, 0.87 ohm
Physics Current Electricity Level: Misc Level
Four resistors in a series circuit are as follows r 1 = 15 ohms, r 2 = 30 ohms, r 3 = 45 ohms, r 4 = 60 ohms. What a voltage of 220 volts across the terminals of the electromotive force, the current in the circuit will be?. 368 amp, 1.47 amps, .682 amp, 5.87 amps
Physics Current Electricity Level: Misc Level
In semiconductors the movement of electrons is governed by the movement between ?
Cathodes, plates, holes, transistors
Physics Current Electricity Level: Misc Level
In your manufacturing company you have 10 lights that have a voltage across them of 200 volts,and the total current used by the lamps is 30 amps. At $ 1. 40 per kwhr, what is the cost of operating the lights for 12hours?
280, 175.6, 100.8, 56.2
Physics Current Electricity Level: Misc Level
The voltage across a number of electrical units is 230 volts and the current used is 35 amps.If it costs. 025 per kWhr to operate these units, what will it cost to operate them for a 16 hours?
092, 20, 3.22, 6.44
Physics Current Electricity Level: Misc Level
The power input required by a dc electric motor that is run on a 220 volt line and draws 10 amps is ?
22 watts, 220 watts, 2200 watts, 22,000 watts.
Physics Properties Of Matter Level: Misc Level
How many inches, to the nearest tenth of an inch, does copper wire 600 ft long increase in length when heated from 60 F to 100 F ?
2.2 in, 26. 7 in , 4.0 in, 48. 0 in,
Physics Current Electricity Level: Misc Level
When the lead storage battery is in use,
Lead peroxide is formed on the positive plate, spongy lead is formed on the negative plate, lead sulfate is formed on the negative plate or the specific gravity of the acid increases.
Physics Current Electricity Level: Misc Level
Which of the following is produced at the negative of the hydrogen -oxygen fuel cell?
Water, carbon dioxide, oxygen, carbon monoxide.
Physics Waves And Oscillations Level: Misc Level
Frequency modulation is one of the processes in which the?
Frequency of the carrier wave is kept constant, amplitude of the carrier wave is varied, sound wave is impressed on the carrier wave, or frequency wave is increased.
Physics Current Electricity Level: Misc Level
The direction of actual electron movement in an electric circuit is ?
From positive to negative, changed according to Ohms law, governed by the resistance of the conductor, or from negative to positive.
Physics Electromagnetic Induction Level: Misc Level
What is the term used when changes of current in a coil of an electromaget induce voltage in the same coil? Codependency -induction, pressure induction, mutual induction, self- induction.
Physics Waves And Oscillations Level: Misc Level
An open organ pipe that is closed at one end both have lengths of 0.52 m at 20 degrees celcius. What is the fundamental frequency of each pipe.
Physics Waves And Oscillations Level: Misc Level
Bats emit sounds of frequencies around 35.0 kHz and use echolocation to find there prey. If a bat is moving with a speed of 12 m/s toward an insect at an air temperature of 20 degrees celcius, a) What frequency is heard by the insect. b) What frequency is heard by the bat from the reflected sound. c) Would the speed of the bat reflect the answers.
Physics Waves And Oscillations Level: Misc Level
How fast in kilometers per hour, must a sound source be moving toward you to make the observed frequency 5.0% greater then the true frequency.
