QUiz Q's answer part2 Flashcards
If no net force is acting on a moving object
its velocity will stay the same
A coulomb is a unit of electrical
charge
A negative electric charge is (choose all that are correct)
repelled by another negative electric charge And attracted to a positive electric charge.
An ampere (amp) is a unit of electrical
current
An object acquires an electrostatic charge when _______ are added or removed.
electrons
The particles that move in an electrical current are
electrons
Anything that hinders current flow is called a
resistor
For a fixed resistance, increasing the voltage will ________ the current in a circuit.
increase
For a fixed voltage, increasing the current will ________ the power in a circuit.
increase
What travels through a conductor at near the speed of light when a current is established?
an electric field
The unit used for measuring resistance is the
ohm
Which of the following will have the lowest resistance?
metal
A neutral atom that gains one or more electrons is called a(n)
negative ion
Electric field lines are drawn
in such a way as to show the direction of the field.
The same current will flow through two light bulbs that are connected together in
series
A magnetic north pole may exist by itself without a corresponding south pole.
FALSE
Particles of a material that move up and down perpendicular to the direction the wave is moving are in what type of wave?
transverse
Sound waves moving through air are what type of wave?
longitudinal
The time required for one cycle (one oscillation) of any repeating event is called the
period
Sound waves travel faster in
warm air
The larger the amplitude of a wave, the higher its speed.
FALSE
You hear a higher pitch when a sound wave has a greater
frequency
Frequency is the time required for one complete cycle.
FALSE
Particles of a material that move back and forth in the same direction the wave is moving are in what type of wave?
longitudinal
Longitudinal waves with a frequency above 20,000 Hz are
ultrasonic
When the trough of one wave arrives at the same time and place as the crest of an otherwise identical wave,
destructive interference occurs.
What is the range of normal human hearing?
20 to 20,000 Hz
