Lab: Circuit Design — Unit test Answers
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A point charge is used to determine the electric field around a charged particle. Why is it necessary that the point charge does not affect the position of the charge being tested?
A
The amount of charge will increase if the charged particle moves closer to the point charge, so any change in position changes the field.B
The amount of charge will decrease if the charged particle moves closer to the point charge, so any change in position changes the field.C
Electric fields are inversely proportional to the square of the distance, so any change in position changes the field.D
Electric fields are directly proportional to distance, so any change in position changes the field.22
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The table lists the values of the constants used to calculate the electrical force and the gravitational force.
A
The electrical force is much smaller than the gravitational force because 8.99 is much greater than 6.67.B
The electrical force is much larger than the gravitational force because 8.99 is much greater than 6.67.C
The electrical force is much smaller than the gravitational force because 109 is much greater than 10–11.D
The electrical force is much larger than the gravitational force because 109 is much greater than 10–11.23
Lucas makes a graphic organizer to compare ways electrical energy is produced.
A
X: Uses turbines to turn generatorsY: Boils water to form steamB
X: Boils water to form steamY: Uses turbines to turn generatorsC
X: Uses uraniumY: Uses falling water to turn turbinesD
X: Uses generators to produce electrical energyY: Burns fuel to form steam24
Which is true of a step-down transformer but not a step-up transformer?
A
The core is made of copper and the coils are made of iron.B
The core is made of iron and the coils are made of copper.C
The primary winding has fewer coils than the secondary winding.D
The primary winding has more coils than the secondary winding.25
If the distance between two charges is increased to three times the original distance, how will the electrical force between the charges compare with the original force?
A
It will increase to three times the original force.B
It will increase to nine times the original force.C
It will decrease to one-third the original force.D
It will decrease to one-ninth the original force.Did you find these answers helpful?
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