FREE RADIOLOGY AND STUDY GAMES ABOUT CH 5A

PDF Download

FREE RADIOLOGY AND STUDY GAMES ABOUT CH 5A

PHYSICS EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -75 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: How does the size of potential relate to magnitude of voltage

Answer:

higher voltage, higher potential to do work

Question 2: how does the size of voltage relate to the ability to do work

Answer:

higher voltage, higher potential to do work Question 3: A material that under some conditions behaves as an insulator and in other conditions behaves as a conductor.

Answer:

Semiconductor

Question 4: Symbol for resistance

Answer:

R

Question 5: what is the relationship between force and charge

Answer:

direct

Question 6: symbol for amperage

Answer:

I

Question 7: what is the accepted direction of current flow

Answer:

going toward negative point

Question 8: define amperage

Answer:

number of electrons flowing in the circuit; measures electrical current

Question 9: give 3 examples of a conductor

Answer:

copper, water, metal

Question 10: what is a similar name of potential difference

Answer:

voltage

Question 11: how many electric charges in 1 coulomb

Answer:

1C=6x10618 electron charges Question 12: A ____ ____ contains elements that are connected at their ends rather than lying in a line along a conductor.

Answer:

Parallel circuit

Question 13: What causes electric potential energy

Answer:

electric charges can do work when released

Question 14: do uncharged particles have electric fields?

Answer:

no

Question 15: symbol for electric potential

Answer:

V Question 16: According to Ben Franklin, positive charges move towards negative charges which stay put.

Answer:

Conventional current Question 17: The force of attraction between unlike charges or repulsion between like charges is due to the electric field. This force is called....

Answer:

electrostatic force

Question 18: Describe Ohm's law and state the formula

Answer:

The voltage across the total circuit or any portion of the circuit is equal to the current times the resistance. R=V/I and I=V/R

Question 19: Describe Law #2 of Electrostatics

Answer:

COULOMBS LAW: The electrostatic force is directly proportional to the product of the electrostatic charges and inversely proportional to the square of the distance between them. F=k(QaQb/d^2)

Question 20: what direction do electrons flow

Answer:

from negative charge to positive charge

Question 21: How is the force of attraction/repulsion affected by increasing the magnitude of charge (in Coulombs law)

Answer:

more force attracting or repelling

Question 22: List the 4 things that influence resistance

Answer:

• what material the conductor is made of

• area

• temperature (less resistance if cooler)

• length

Question 23: Compare the move-ability of electrons and protons

Answer:

Protons are fixed in the nucleus, electrons can move from shell to shell of different atoms

Question 24: State the rules for a series circuit

Answer:

• The total resistance is equal to the sum of the individual resistances.

• The current through each circuit element is the same and is equal to the total circuit current.

• The total voltage is equal to the sum of the voltages across each circuit.

Question 25: A connection that causes electrons to flow from one place to another.

Answer:

Contact

Question 26: The study of electric charges in motion

Answer:

Electrodynamics