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Worksheets6th Six Weeks Review
Total questions: 33
Worksheet time: 20mins
A 60 W rated micro-mini fridge designed to cool cans of soda is connected to 120 V. What current is supplied to the fridge? P=IV
(a)
How much current is drawn by a 120.0-W satellite dish that has a resistance of 480 Ω? P=IV and V=IR
(a)
A coffee pot heating coil turns electrical energy into heat through a resistive process called Joule heating. Determine the power rating of a heating coil that has a resistance of 120 Ω and is operated at 120 V. P=IV and V=IR
(a)
Many electrical appliances such as straightening irons, electric razors, and hair dryers come with warning tags not to use them while in the shower or bathtub. How does wet skin make these appliances more dangerous?
Wet skin has a lower resistance, allowing more voltage to enter the body.
Wet skin has a higher resistance, allowing more voltage to enter the body.
Wet skin has a lower resistance, allowing more current to enter the body.
Wet skin has a higher resistance, allowing more current to enter the body.
Which of the following summarizes Ohm’s law in relation to electric circuits?
Current is directly proportional to both the resistance and the voltage difference.
Current is inversely proportional to both the resistance and the voltage difference.
Current is directly proportional to the voltage difference and inversely proportional to the resistance.
Current is directly proportional to the resistance and inversely proportional to the voltage difference.
The current in a 12.0 Ω resistor is 0.50 amps. What is the voltage drop across the resistor? V=IR
(a)
Two incandescent bulbs connected in series have operating resistances of 36 Ω and 36 Ω, respectively. The current through the 36 Ω bulbs is 0.50 A. What is the voltage drop across the two bulbs? V=IR
(a)
What is the current in this circuit? V=IR
(a)
What is the resistance of this circuit? V=IR
(a)
Which of the following best describes the function of a resistor in an electrical circuit?
It opens the circuit.
It creates the electric field.
It controls the amount of current.
It provides energy to the circuit.
One device used for electrical safety involves a metal strip that bends when it gets hot. This bending flips a switch which interrupts the current. What is this device called?
circuit breaker
fuse
electric meter
resistor
A switch that can open or close an electric circuit can be used to
increase the amount of current.
reverse the current’s direction.
stop the current.
accelerate the current.
Four significantly different household appliances (blender, mixer, toaster, and food processor) are plugged into four outlets along a counter. Turning on or off one or more of the appliances does not affect the performance of the other appliances because the four appliances
run on a direct current.
are connected in series.
are connected in parallel.
run on an alternating current.
Three point charges are arranged in fixed positions as in the figure above. Which statement describes the direction of the attractive and/or repulsive forces that Charge 2 experiences?
Charge 2 experiences a repulsive force to the left from Charge 3 and an attractive force down from Charge 1.
Charge 2 experiences an attractive force to the right from Charge 3 and an attractive force down from Charge 1.
Charge 2 experiences a repulsive force to the left from Charge 3 and a repulsive force up from Charge 1.
Charge 2 experiences a repulsive force to the right from Charge 3 and a repulsive force down from Charge 1.
▲
In some materials, electrons are not able to move freely into the conduction band. This is due to the large amount of energy needed to make them move. How is this type of material classified?
conductor
semiconductor
capacitor
insulator
Which figure correctly illustrates the electric field between two oppositely charged parallel plates?
Two point charges create the electric field as shown in the figure above.
Apply the rules for the geometry of electric fields to determine the charges of X and Y.
X is a positive charge and Y is a negative charge.
X is a negative charge and Y is a positive charge.
X and Y are both positive charges.
X and Y are both negative charges.
Two point charges create the electric field as shown in the figure above.
Apply the rules for the geometry of electric fields to determine the charges of X and Y.
X is a positive charge and Y is a negative charge.
X is a negative charge and Y is a positive charge.
X and Y are both positive charges.
X and Y are both negative charges.
Which illustration correctly shows the conventional orientation of the electric field around a positive point charge?
Which of the following describes light waves?
transverse electromagnetic waves that can travel through matter and vacuum
longitudinal electromagnetic waves that can travel through matter and vacuum
transverse mechanical waves that require a medium
longitudinal mechanical waves that require a medium
What determines the color of a light wave?
frequency
speed
phase difference
amplitude
Which of the following is not an example of a transverse wave?
light from a star
sound from a tuning fork
ripple on pond surface
vibration of a guitar string
A stereo speaker is made of a flexible cone-shaped material that vibrates, creating a sound wave. A sound wave formed by a speaker travels through air to your ear as a series of compressions and rarefactions of air molecules. Which statement classifies the sound wave?
transverse wave in which the particles of the wave move in a direction parallel to the wave motion
longitudinal wave in which the particles of the wave move in a direction parallel to the wave motion
transverse wave in which the particles of the wave move in a direction perpendicular to the wave motion
longitudinal wave in which the particles of the wave move in a direction perpendicular to the wave motion
During a baseball game, fans in the stands create a “wave” by standing up from their chairs when the wave arrives at their location. Which sentence classifies this type of wave and its particle motion?
It is a transverse wave in which the particles of the wave move in a direction parallel to the wave motion.
It is a longitudinal wave in which the particles of the wave move in a direction parallel to the wave motion.
It is a transverse wave in which the particles of the wave move in a direction perpendicular to the wave motion.
It is a longitudinal wave in which the particles of the wave move in a direction perpendicular to the wave motion.
Which type of wave displaces its medium in the direction of its propagation?
light
sound
water ripple
shaken rope
Which statement about sound waves is correct?
Sound waves transfer energy through a vacuum.
Sound waves transfer energy through vibration of a medium.
Sound waves transfer energy in the electromagnetic spectrum.
Sound waves transfer energy by permanent displacement of particles.
Which types of electromagnetic waves are ionizing radiation?
microwaves and infrared light
microwaves and X-rays
gamma rays and infrared light
gamma rays and X-rays
What type of wave is produced when the frequency of a visible light wave is increased?
infrared
radio
ultraviolet
microwave
Which of the following electromagnetic waves has a longer wavelength than visible light?
infrared
gamma
X-rays
ultraviolet
The diagram above shows waves that are
seismic.
mechanical.
longitudinal.
electromagnetic.
Which has the longest wavelength?
red light
green light
violet light
yellow light
Which numbered area on the electromagnetic spectrum shown above contains visible light?
1
2
3
4
Which of these colors of visible light has the shortest wavelength?
red
green
violet
yellow
