Formative Assessment #1 L2-EC1
1. Determine the change in electric force in the following situations: (increase, decrease)
a. 2 objects are 1 m from each other, they are pulled to 2 m away from each other ______
b. 1 object has a net charge of 1, a second object has a net charge of 2. The ______charges on the 2 objects double
c. 2 objects are 2 m from each other, they are pulled toward each other ______
L2-EC2
Identify the method used to create a charge in the following situations:
A. Induction B. conduction C. friction
______Electrons are transferred because of things rubbing against each other
______A charged object comes into contact with a neutral object and electrons are transferred.
______A charged rod gets close to an uncharged bar. The bar on the side of the rod will acquire a charge opposite to that of the rod. The far side of the bar will have charge the same as the rod.
L2-EC3
Determine which of the following terms match the statements below
A. Current B. voltage C. resistance
____ Measured with an ammeter
____ the force that makes electrons move in a certain direction within a conductor
____ Measured in volts (v)
____ Can be supplied by a battery
____ the flow of electrons
____ the forces that oppose the flow of electron current in a conductor.
____ can prevent circuits from overheating
L2-EC4
Identify the following statements as being part of a series (s) or a parallel (p) circuit.
a. More than one path for the electricity to flow:______
b. One bulb goes out, they all go out:______
c. Bulbs get dimmer when connected:______
d. Has less resistance as you add more bulbs:______
e. Your home is hooked up this way:______
L3-EC1
2. On two occasions, the following charge interactions between balloons A, B and C are observed. In each case, it is known that balloon B is charged negatively. Based on these observations, what can you conclusively confirm about the charge on balloon A and C for each situation.
3. Upon entering the room, you observe two balloons suspended from the ceiling. You notice that instead of hanging straight down vertically, the balloons seems to be repelling each other. You can conclusively say ...
a. both balloons have a negative charge.
b. both balloons have a positive charge.
c. one balloon is charge positively and the other negatively.
d. both balloons are charged with the same type of charge.
Explain your answer.
4. Jean Yuss is investigating the charge on several objects and makes the following findings.
Object C / Object D / Object E / Object Fattracts B / repels C / attracts D
repels F / attracts A
Jean knows that object A is negatively charged and object B is electrically neutral. What can Jean Yuss definitively conclude about the charge on objects C, D, E, and F? Explain.
6. Two objects are charged as shown at the right. Object X will ____ object Y.
a. attract / b. repel / c. not affect7. Two objects are shown at the right. One is neutral and the other is negative. Object X will ____ object Y.
a. attract / b. repel / c. not affect8. Balloons X , Y and Z are suspended from strings as shown at the right. Negatively charged balloon X attracts balloon Y and balloon Y attracts balloon Z. Balloon Z ____. List all that apply.
a. may be positively charged
b. may be negatively charged
c. may be neutral
d. must be positively charged
e. must be negatively charged
f. must be neutral
L3-EC3-4
4. Which light bulb(s) would still stay lit if A burned out in figure 2?
a. None
b. B and C
c. E and F
d. F only
5. Which light bulb(s) would still stay lit if B burned out in figure 2?
a. None
b. A, C, D, and E
c. A, D, and E
d. A and E
6. If light bulbs B and C were the only bulbs in a series circuit in figure 2, and A was replaced with a wire, the brightness of light bulb B would
a. Stay the same
b. Get brighter
c. Get dimmer
d. Not work