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