Phys 202- Exam 1 updated actual questions
and CORRECT answers
A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral
metallic sphere. It is allowed to touch the sphere for a few seconds and then is separated from
the sphere by a small distance. After the rod is separated, the rod... - CORRECT
ANSWER is repelled by the sphere
The electron-volt is a unit of - CORRECT ANSWER energy.
If the voltage at a point in space is zero, then the electric field must be... - CORRECT
ANSWER impossible to determine based on the information given.
A proton, initially at rest, is accelerated through an electric potential difference of 500V. What
is the kinetic energy of the proton? - CORRECT ANSWER 500*(1.6e-19)=8.0e-17
An atomic nucleus has a charge of +40e. An Electron is 10^-9 from the nucleus. What is the
Force on the electron? - CORRECT ANSWER 9.2nN **
If a conductor is in electrostatic equilibrium near an electric charge... - CORRECT
ANSWER the electric field on the surface of the conductor is perpendicular to the
surface
A 5.0-C charge is 10m from a small test charge. What is the magnitude of the electric field at
the location of the test charge? - CORRECT ANSWER 4.5e^8 N/C
A neutral atom always has.. - CORRECT ANSWER the same number of protons as
electrons.
Electric field lines near positive point charges.. - CORRECT ANSWER radiate
outward.
and CORRECT answers
A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral
metallic sphere. It is allowed to touch the sphere for a few seconds and then is separated from
the sphere by a small distance. After the rod is separated, the rod... - CORRECT
ANSWER is repelled by the sphere
The electron-volt is a unit of - CORRECT ANSWER energy.
If the voltage at a point in space is zero, then the electric field must be... - CORRECT
ANSWER impossible to determine based on the information given.
A proton, initially at rest, is accelerated through an electric potential difference of 500V. What
is the kinetic energy of the proton? - CORRECT ANSWER 500*(1.6e-19)=8.0e-17
An atomic nucleus has a charge of +40e. An Electron is 10^-9 from the nucleus. What is the
Force on the electron? - CORRECT ANSWER 9.2nN **
If a conductor is in electrostatic equilibrium near an electric charge... - CORRECT
ANSWER the electric field on the surface of the conductor is perpendicular to the
surface
A 5.0-C charge is 10m from a small test charge. What is the magnitude of the electric field at
the location of the test charge? - CORRECT ANSWER 4.5e^8 N/C
A neutral atom always has.. - CORRECT ANSWER the same number of protons as
electrons.
Electric field lines near positive point charges.. - CORRECT ANSWER radiate
outward.
