1
Giovanni Aldini was the first to demonstrate which of the following through his experiments?
a. the discovery of radioactivity and splitting of atoms
b. the discovery of neurons as individual cells
c. the proton being identified as atomic particle
d. explaining how objects accelerate when dropped
e. the brain hemisphere controls opposite body side
e. the brain hemisphere controls opposite body side
According to the USAD Science Resource Guide, a substance can be a good conductor in two different
contexts, which are:
a. electricity or vibration
b. sound or light
c. electricity or magnetism
d. electricity or heat
e. heat or elasticity
d. electricity or heat
What is the function of a transformer in an electrical system?
a. to change voltage levels
b. to store electrical energy
c. to convert AC to DC
d. to control current flow
e. to amplify signals
a. to change voltage levels
What did the Galvanis observe when touching a dissected frog with two metals?
a. The frog’s body remained still.
b. The frog’s body jolted.
c. Metals became charged.
d. The frog’s heart stopped.
e. The frog’s skin changed color.
b. The frog’s body jolted.
Which unit is used to measure electric current?
a. Volt
b. Ohm
c. Joule
d. Watt
e. Ampere
e. Ampere
In Western thought, the prevailing idea for centuries was that all things on Earth are made of a combination
of what basic elements?
a. air, steel, fire, and water
b. earth, air, fire, and water
c. air, metal, wood, and water
d. fire, water, air, and metal
e. stone, ice, and heat
b. earth, air, fire, and water
A current of 0.001 ampere causes what effect on the human body?
a. an experience of numbness
b. no effect
c. a slight shock
d. muscle contraction
e. heart stop
c. a slight shock
Dielectric breakdown occurs when
a. voltage is too low
b. capacitor is cool enough
c. insulator becomes conductor
d. charge is neutralized suddenly
e. plates bend physically out
c. insulator becomes conductor
Which planet is known to have a much thicker upper atmosphere than Earth and more frequent lightning?
a. Mars
b. Mercury
c. Neptune
d. Venus
e. Uranus
d. Venus
Multiple resistors connected in parallel will ___________________________.
a. increase total resistance slightly
b. keep resistance constant mostly
c. reduce equivalent resistance
d. double current flow
e. stop current flow
c. reduce equivalent resistance
How did early philosophers describe atoms?
a. infinitely divisible substances
b. very large structures
c. indivisible smallest particles
d. building blocks with living energy
e. pure energy forms
c. indivisible smallest particles
Which property of electric charge did Benjamin Franklin discover?
a. conservation of charge
b. creation of charge
c. destruction of charge
d. attraction only
e. repulsion only
a. conservation of charge
How fast do electrons drift through a typical wire?
a. several kilometers per second
b. less than one millimeter per second
c. speed of light
d. several meters per second average
e. hundreds of meters per second roughly
b. less than one millimeter per second
Which modern concept challenges the idea that atoms are indivisible?
a. molecules
b. compounds
c. subatomic particles
d. ions
e. quantum fields
c. subatomic particles
Which of the following BEST states Newton’s first law about inertia?
a. Objects stop moving quickly unexpectedly.
b. Objects fall faster freely.
c. Only heavy objects move sometimes.
d. Forces change mass gradually.
e. Objects keep moving without forces.
e. Objects keep moving without forces.
While troubleshooting a circuit, you measure 10 volts across a resistor and 0.5 amperes of current through
it. What is the resistance?
a. 5 ohms
b. 20 ohms
c. 15 ohms
d. 10 ohms
e. 25 ohms
b. 20 ohms
If you want to increase the current in a circuit without changing the voltage, what should you do to the
resistance?
a. increase resistance
b. keep resistance constant
c. add resistors in series
d. disconnect part of the circuit
e. decrease resistance
e. decrease resistance
How does increasing the mass of an object affect its acceleration when pushed with the same force?
a. increases acceleration
b. decreases acceleration
c. has no effect
d. makes acceleration unpredictable
e. reverses acceleration
b. decreases acceleration
A balloon rubbing on hair is not considered dangerous despite high voltage buildup because
____________________.
a. hair does not produce current
b. air and balloon are insulators
c. the charges are neutralized
d. current flows freely
e. all of the above
b. air and balloon are insulators
What kind of quantity is a scalar?
a. has magnitude only
b. has direction only
c. has magnitude and direction
d. neither magnitude nor direction
e. changes with position
a. has magnitude only
Which function does the air serve between a hand and a metal doorknob in the scenario leading to an
electric shock?
a. capacitor plate
b. dielectric material
c. resistor
d. energy source
e. capacitor plate and resistor
b. dielectric material
When a cloth picks up negative charge from a glass rod, what happens to its mass?
a. slightly increases
b. decreases significantly
c. stays the same
d. decreases slightly
e. fluctuates randomly
a. slightly increases
Which of the following is TRUE about friction and kinetic energy as a brick slides to a stop?
a. Kinetic energy becomes potential energy.
b. Heat energy converts to kinetic energy.
c. Kinetic energy remains unchanged.
d. Kinetic energy becomes electrical.
e. Kinetic energy turns into heat energy.
e. Kinetic energy turns into heat energy.
What form of energy does a moving baseball have?
a. potential energy
b. thermal energy
c. kinetic energy
d. nuclear energy
e. chemical energy
c. kinetic energy
How is a Van de Graaff generator able to build a charge on its metal sphere?
a. Electrons transferred by conveyor belt.
b. Electrons are transferred continuously.
c. Neutrons build up inside.
d. Protons accumulate on rollers.
e. none of the above
a. Electrons transferred by conveyor belt.