SBQ-2-PHY50A

Lines drawn to represent an electric field extend __________ a positive charge and __________ a negative charge.

• toward, away from

• toward, toward

• away from, toward

• away from, away from

An electric field is about 150 N/C downward. What is the direction of the force on a positively-charged particle?

• Upward

• Downward

• Changes rapidly

• No force

The direction of the electric field is the direction of the __________.

• work done moving the test charge

• potential difference

• force on the positive test charge

• force on the negative test charge

Which of the following statements is/are true regarding the electric field lines? I. They originate on positive charges and terminate on negative charges. II. Field lines never cross each other. III. The direction of electric field is tangent to the field line at any point in space.

• I only

• II only

• III only

• I, II and III

What is the electric field strength 20.0 cm from a point charge of 8.0cm?

As a positive test charge moves farther from a positive charge in an electric field, the potential energy __________.

• increases

• decreases

• doubles

• remains the same

The SI derived unit of potential difference is the ___.

• ohm

• volt

• joule

• coulomb

What is the potential difference between two plates that are 18 cm apart with a field of 4.8×10(+/?

• 27 V

• 86 V

• 0.86 kV

• 27 kV

What is the electric potential 45.5 cm away from a point charge of 12.5 =(?

• 0.247 V

• 1.45 V

• 4.22 V

• 10.2 V

Which pair has the highest potential energy?

• +5 C and +3 C

• +5 C and –3 C

• –5 C and +3 C

• All pairs have the same potential energy