Physics Exam 1

A shirt and a sock are electrically neutral until they rub against each other in the dryer. The sock then has a negative charge and the shirt has a...

• negative charge

• positive charge

• neutral charge

• both charges

Must two neutral objects rub across one another in order to exchange and become charge?

• Yes they must rub together

• they have to touch

• no the neutral objects can become charged in other ways

• neutral objects cant transfer charges

If I stick two pieces of plastic tape together, one above the other, and then peel them apart, they will...

• repel one another

• break

• attract one another

• be glued together forever

According to Coulomb's Law, a pair of particles that are placed twice asfar apart will experience forces that are..

• twice as strong

• 1/4 as strong

• 1/2 as strong

• four times as strong

In the electric field surrounding a group of charged particles, field strength is greater where field lines are...

• thickest

• longest

• farthest apart

• closest

At equilibrium, the electric field inside hollow metal shell is

• positive

• negative

• zero

If it takes 10 Newtons of force to hold a 0.1 Coulomb particle at rest in an electric field, the strength of the field there is

• 1 N/C

• 10 N/C

• 100 N/C

• 1000 N/C

You are covered with static electricity. If you hold a sharp pin in your hand as you reach out for the doorknob, the pin will...

• make the shock you get worse

• make the shock you get weaker

• leave the shock you get unchanged

In the dark, the photoconductors used in most xerographic copiers are..

• insulators

• semi-conductors

• conductors

• super-conductors

A power line carries current 10A and has resistance 2.0 Ω. What is the voltage drop across the line?

• 200V

• 20V

• 10V

• 5V