CHARGING
ELECTRIC CURRENT
CIRCUITS
MAGNETISM
SOUND
100
When we charge an object by indirect contact it is called
What is induction?
100
The primary reason a bird can perch harmlessly on bare high voltage wires is that there is no _____ _____ across the bird's feet.
What is potential difference?
100
A transformer transforms _____.
What is voltage?
100
List the three elements that are magnetic. (INC)
What is Iron, Nickle, and Cobalt?
100
Sound waves move at speeds of about 330 m/s is air depending on the ____ of the air.
What is temperature?
200
In electric field drawings of a positive charge, the arrows point in this direction, toward the positive or away from the positive.
What is away?
200
Compared to thin wires, electrical resistance in thick wires is ____.
What is less?
200
When one light bulb in a SERIES circuit containing several light bulbs burns out, the other light bulbs
What is do not burn at all.
200
A device that converts mechanical energy into electrical energy.
What is a generator?
200
Sound waves cannot travel in ____ ____.
What is outer space?
300
This way of charging causes the object to have an opposite charge.
What is friction?
300
The electrical current from a battery is ___.
What is DC? (direct current)
300
True or False: In a series circuit, the total voltage drop across a series of resistors is the sum of voltage drops across each individual resistor. True False
What is true?
300
The primary coil of a transformer has 100 turns on it and the secondary coil has 50 turns on it. This is an example of a
What is step-down transformer?
300
Compared to the speed of light, sound travels
What is slower?
400
This substance allows electrons to easily flow.
What is a conductor?
400
If you accidentally grabbed the prongs of a partially plugged-in 120-V electrical plug on a day when your skin resistance was 120 000 ohms, how much current would pass through your body? I=V/R (Ohm's law)
What is .001 A? V=120 volts R=120000 ohms ------------------------- I = ? I=120 volts / 120 000 ohms I = 0.001 A
400
A CLOSED circuit is a circuit in which charge
What is can flow.
400
The north pole of a bar magnet near a south pole of another will....
What is attract?
400
A sound wave has a frequency of 0.05 hertz and a wavelength of 10 meters. What is the wave’s speed? (wavelength = speed / frequency)
What is 0.5 m/s?
500
According to Coulomb's Law, given 2 fixed charges, if the distance is doubled the force will decrease by two or four times?
What is four?
500
When connected to a 120-volt power supply, how much current exists in a light bulb that has a resistance of 240 ohms? I = E/R
What is .5 A? 120/240 = 0.5 amps.
500
True or False: In a parallel circuit, current in each branch is the same.
What is true?
500
Which of the following is NOT an electromagnetic wave? sound radio x-ray
What is a sound wave?
500
Wavelength = speed/frequency A clarinet can play an F Sharp (F#) note that has a frequency of 370 Hz. If sound travels in air at a speed of 340 m/s, what is the wavelength of this note?
What is 0.92 nanometers?
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