3rd Q Exam Review Question Preview (ID: 41574)
Electricity.
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Which statement is FALSE regarding Newton's law of Universal Gravitation and Coulomb's Law
a) Newton's Law is used for large masses and mass only effects Newton's Law
b) Both use mass to find the strength of both kinds of forces
c) Coulomb's Law is used for extremely small bodies and charge only effects Coulomb's Law
d) Both require a distance to find the force
Find the power in a bulb that has a 10.0V across it when a current of 2.5A passes through it
a) 25W
b) 4.0W
c) 0.25W
d) 25ohms
The power ratings on lightbulbs measure what?
a) the rate they give off heat and light
b) how hard it is for the battery to work
c) the voltage they require
d) density of charges
What is the symbol and unit for Power?
a) Symbol P, unit N
b) Symbol P, unit Ohm
c) Symbol W, Unit P
d) Symbol P, Unit W
What are the units for Voltage, current, and resistance?
a) Voltage-V, Current- I, Resistance-R
b) Voltage-V, Current-C, Resistance-R
c) Voltage-V, Current-A, Resistance-ohm
d) Voltage-V, Current-A, Resistance-R
Find the voltage in a circuit that has 4.5ohms of resistance and 2.1A passing through it
a) 9.5V
b) 2.1V
c) 0.47V
d) 2.4V
A 1.5V battery is attached to a circuit with a resistance of 2.6ohms in it. Find the current
a) 1.7A
b) 0.58A
c) 3.9A
d) 4.1A
What are the symbols for voltage, current, and resistance?
a) Voltage-V, Current- I, Resistance-R
b) Voltage-V, Current-C, Resistance-R
c) Voltage-V, Current-A, Resistance-ohm
d) Voltage-V, Current-A, Resistance-R
A circuit with a break or opening in the path is said to be
a) an open circuit
b) a short circuit
c) a schematic diagram
d) a closed circuit
A material that slows down or resists the flow of electrical current can be described as a
a) Insulator
b) Conductor
c) Metal
d) the definition of Power
A circuit with a continuous path for the flow of charges is called
a) an open circuit
b) a short circuit
c) a schematic diagram
d) A closed circuit
A 9.0V battery creates an electrical current of 2.3A. What is the resistance of the circuit?
a) 3.9ohms
b) 0.26ohms
c) 20.7ohms
d) 6.7ohms
gravitational field strength depends on
a) mass and distance
b) charge and distance
c) charge and mass
d) the gravitational constant (G) and mass
Electric field strength depends on
a) mass and distance
b) charge and mass
c) charge and distance
d) the constant (K) and mass
A positive and a negative charge would do what when brought together?
a) explode
b) attract
c) repel
d) get weaker
materials that allow charges to move freely are called
a) conductors
b) insulators
c) resistors
d) motors
If two charges are moved farther apart, the strength of the force between the charges would
a) increase
b) double
c) stay the same
d) decrease
repelling forces occur between
a) like charges
b) unlike charges
c) charges of equal magnitude
d) charges of unequal magnitude
Two protons (+ charges) would do what if you brought them together?
a) explode
b) attract
c) repel
d) become smaller
Attractive forces occur between
a) like charges
b) unlike charges
c) charges of equal magnitude
d) charges of unequal magnitude
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