PHYSICS 208 EXAM 1QUESTIONS AND ANSWERS
What is the S.I. unit for current? - CORRECT ANSWER✅✅AMPERE
When a hard rubber rod is given a negative charge by rubbing it with wool, - CORRECT
ANSWER✅✅Electrons are transferred from wool to rod.
In the figure, a particle moves through a rightward displacement 𝑑 in a uniform electric field 𝐸. As
shown in the figure, the electric field is leftward and the particle is positively charged. Complete the
sentence: when the particle moves through the displacement 𝑑, - CORRECT ANSWER✅✅The electric
force does negative work and potential energy increases.
The figure below shows two particles with charges of equal magnitude but opposite signs. The positive
charge is to the left of the negative charge. Point A is at the midpoint between the charges and B is to
the right of the negative charge. What is the direction of
the electric field at points A and B? - CORRECT ANSWER✅✅The electric field is rightward at point A and
leftward at point B.
A parallel plate capacitor is connected to a battery that maintains a constant potential difference
between the plates. If the plates are pulled away from each other, increasing their separation, then -
CORRECT ANSWER✅✅The charge on the capacitor decreases
When you double the potential difference across a resistor, - CORRECT ANSWER✅✅Current doubles,
Resistance stays the same
Each of three objects carries a charge. As the drawing shows, objects A and B attract each other, and
objects C and A also attract each other. Which one of the following statements concerning objects B and
C is true? - CORRECT ANSWER✅✅They repel each other.
A positively charged ebonite rod is brought close to a small ball. The rod does not touch the ball, which
is made from a conducting material. The ball is electrically neutral. Which one of the following
statements is true? - CORRECT ANSWER✅✅The rod attracts the ball.
What is the S.I. unit for current? - CORRECT ANSWER✅✅AMPERE
When a hard rubber rod is given a negative charge by rubbing it with wool, - CORRECT
ANSWER✅✅Electrons are transferred from wool to rod.
In the figure, a particle moves through a rightward displacement 𝑑 in a uniform electric field 𝐸. As
shown in the figure, the electric field is leftward and the particle is positively charged. Complete the
sentence: when the particle moves through the displacement 𝑑, - CORRECT ANSWER✅✅The electric
force does negative work and potential energy increases.
The figure below shows two particles with charges of equal magnitude but opposite signs. The positive
charge is to the left of the negative charge. Point A is at the midpoint between the charges and B is to
the right of the negative charge. What is the direction of
the electric field at points A and B? - CORRECT ANSWER✅✅The electric field is rightward at point A and
leftward at point B.
A parallel plate capacitor is connected to a battery that maintains a constant potential difference
between the plates. If the plates are pulled away from each other, increasing their separation, then -
CORRECT ANSWER✅✅The charge on the capacitor decreases
When you double the potential difference across a resistor, - CORRECT ANSWER✅✅Current doubles,
Resistance stays the same
Each of three objects carries a charge. As the drawing shows, objects A and B attract each other, and
objects C and A also attract each other. Which one of the following statements concerning objects B and
C is true? - CORRECT ANSWER✅✅They repel each other.
A positively charged ebonite rod is brought close to a small ball. The rod does not touch the ball, which
is made from a conducting material. The ball is electrically neutral. Which one of the following
statements is true? - CORRECT ANSWER✅✅The rod attracts the ball.
