Physics A- Final Exam Review
What kind of lenses used to produce a real image?
Convex lens
Besides a plane mirror, what type of mirrors are use as a rear view mirror and why?
Convex, because it's a bigger field of view
What is the nature of an image formed by a concave mirror of focal length 10 cm for a real objects placed three cm from the mirror? A) Real and inverted B) Real and upright C) Virtual and inverted D) Virtual upright
D) Virtual and Upright
If the frequency of the periodic wave is doubled, the period of the wave will be what?
Doubled
A what transfers what?
Energy, only
True or False a concave mirror always forms an inverted and smaller images no matter where the object is located?
False
True or False all concave mirror images are inverted?
False
True or False all concave mirror images are real?
False
True or False secular reflection obeys the laws of reflection while diffuse reflection does not?
False
True or False the lens of the eye has a fixed (constant) focal length?
False
True or false A high frequency wave and a low frequency wave traveling in the same medium. The higher frequency wave has a greater speed?
False
True or false a wave pools is a full wave used to study wave behavior?
False
True or false clothes in a dryer pick up static charges due to conduction
False
True or false if a spring is shaken to create a set of waves in the amplitude of the wave is doubled the speed of the wave increase?
False
True or false one kilowatt-hour is the unit of power
False
True or false sound can travel through a vacuum?(empty space)
False
True or false the Doppler effect can be noticed when a sound source begins to move, but not when the observer moves?
False
True or false the bobber in the water moves towards the shore because of the wave?
False
True or false the frequency of a wave increases as it enters a new medium if the speed in the new medium is faster?
False
True or false the time period for a wave (T) increase with increasing frequency of the wave?
False
True or false the time period of a pendulum changes based on The mass of the bob?
False
True or false two 10Ohm lights are brighter if connected in series rather than parallel with the same power source
False
True or false two different types of instruments playing the same musical note will have identical wave forms?
False
True or false when a switch is closed in a complete circuit the flow of charge is from the (-) to the (+) poles of the battery
False
True or false where a negatively charged rod is brought near an neutral electroscope, the leaves move apart because they have excess protons and repel
False
True or false loudness is measured in decibels and is related to the frequency of sound?
False because it's related to the amplitude
Describe the properties of a plan mirror
Produces a virtual image, upright and behind the mirror
Of what colors does light consist of?
ROYGBIV
The flaw caused by light separating into colors as it passes through a lens is called what?
Real Image
The flaw in a spherical mirror that causes light to not focus precisely is called what?
Spherical Aberration
If a string is vibrating in four parts, there are points where It can be touched without disturbing it's motion. How many of these points exist?
Standing wave and it can be touched without interference with the motion at one of the 5 node points
True or False A convex lens can be used to obtain an enlarged virtual image?
True
True or False a concave lens always forms an upright and smaller images no matter where the object is placed?
True
True or False a convex lens is used to correct the vision of a farsighted person?
True
True or False all convex mirror images are reduced?
True
True or False normal lines are always perpendicular to the surface?
True
True or false Sound is a longitudinal wave?
True
True or false a more smaller powered (125 hoot 1500W) the bigger one can do it faster
True
True or false during reflection the angle of the incidence is always equal to the angle of the reflection?
True
True or false if a reflective wave is inverted when hitting a change in medium, then the new medium is more rigid?
True
True or false if the distance between two like charges is halved, the force between the two charges quadruples
True
True or false pitch is controlled by frequency?
True
True or false the ammeter readings will be the same everywhere in a series circuit
True
True or false the speed at which the electricity flows through a circuit is known as the current
True
True or false vibrating source increases the wavelength, but the medium remains the same, the frequency will decrease?
True
What is necessary for production and transmission of sound?
Vibrating object and a material
What color has the shortest wavelength?
Violet
A change in the speed of a wave as it enters a new medium produces a change in what?
Wavelength
How many general methods of energy transfer are? Give two examples of each
1. Partical transfer- throwing a softball 2. Waves-light and sound waves
A motors used to produce 4.0 waves each second in a string. What is the frequency of the wave?
4.0Hz
When a glass rod is rubbed with silk and becomes positively charged A) Electrons are removed from the rod B) Protons are added to the silk C) Protons are removed from the silk D) The silk remains neutral
A) Electrons are removed from the rod
If the pitch of sound is increased, what happens to the following: A) Frequency B) Wavelength C) Wave Velocity D) Amplitude
A) Increases B) Decreases C) Unchanged D) Unchanged
The number of current in a series circuit is A) One B) Two C) Three D) Depends on the no# of resistors
A) One
The amount of energy in a waterway this most closely related to what?
Amplitude
Which of the following objects can set fire to a piece of paper in presence of of sunlight A) Double concave lens B) Convex Lens C) Convex mirror D) Concave Lens
B) Convex Lens
In a series circuit, each resistor experiences the same __________ even if they are different resistors A) Voltage Drop B) Current C) Resistance D) Capacitance
B) Current
As the distance from a charged particle increases, the strength of its electric field A) Increases B) Decreases C) Remains the same D) First increases and the decreases
B) Decreases
Which of the following actions performed on a metal surface significantly increase the proportion of incident light that undergoes specular reflection A) Matte finish painting B) Polishing C) Etching D) Sand blasting
B) Polishing
What is added to a house's wiring system to protect against high current A) Sure suppressor B) Relay C) Circuit breaker D) Fuse
C) Circuit breaker
You want to charge an electroscope positive (+) but you only have. A negatively (-) charged rod. Which type of charging method you have to use A) Friction B) Conduction C) Induction D) Not possible
C) Induction
What happens to a path of a light ray parallel to the principle axis after it passes through the converging lens? A) It remains parallel to the principal axis B) it passes through the 2F position on the other side the lens C) It passes through focus on the other side the lens D) it is reflected and passes through the focus on the same side of the lens
C) It passes through focus on the other side of the lens
The total resistance in a parallel circuit is A) Equal to the sum of the resistors B) Always the same in every branch C) Less than any of the individual resistors D) Cannot be calculated
C) Less than any of the individual resistor
What would happen to the current in a circuit if both the Voltage and Resistance were doubled A) Higher Current B) Lower Current C) Same Current D) Alternating Current
C) Same Current
Microphone is now moved at a constant speed away from the speaker. Creating a Doppler effect. The parent frequency detected by the moving microphone is what?
Lower
The microphone detects the sound of a 1,000Hz sound wave 1.00 meter from the speaker. Which type of wave was emitted by the speaker?
Mechanical wave and longitudinal wave
Inverted pulse means what
More rigid
Surface Waves
Move both perpendicular and parallel
Longitudinal Waves
Move parallel
Transverse Waves
Move perpendicualr
The defect In Vision whereby the image of an object is formed in front of the retina is also known as what?
Nearsighted
What happens to a spring at the nodes of a standing wave?
Nothing happens at the node of the spring
Does the Doppler shift occur for only some waves or all waves
Occurs for all waves
As a transverse wave travels through a medium, individual particles of the medium move which way?
Perpendicular to the way direction
Name two type of perception sound and the physical characteristics of sounds waves that corresponds to them
Pitch- Frequency Loudness- Amplitude