14.1J) Journal: CASTLE #4 Homework Review

1. 1. The 10 bulbs (indicated by —O— ) in each of the following diagrams are all identical. Predict the relative brightness of each of the bulbs according to the pressure differences indicated by the colors. Indicate brightness as one of the following: Very Bright, Bright, Moderate, or Dim.

Note: Letters that are not lit are not included.

Groups:

(a) Very Bright

,

(b) Bright

,

(c) Moderate

,

(d) Dim

• h

• i

• e

• d

• b

• c

• g

• f

• j

Answer explanation

2. Suppose you have a charged capacitor as in the circuit in Figure 2a, and then you replace the battery with an uncharged capacitor to obtain the circuit in Figure 2b.

What will you observe when you make this change?

Answer explanation

3. 3. Begin with two long bulbs, a discharged capacitor and a battery, with a break somewhere in the circuit.

Describe the visible events you would observe following each change as indicated in the sequence below.

The sequence begins when the circuit is completed and the capacitor begins to charge.

Answer explanation

Label or color the terminals, plates and wires in each circuit to show the correct color code (R/O/Y/G/B) for the electric pressures in the following situations. Also, draw starbursts around each bulb to indicate its brightness if it lit.

d

f

h

c

Dim Bulb

Bright Bulb

O

B

R

G

Y

Out Bulb

Answer explanation

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Label the color of the wires in each circuit to show the correct color code (R/O/Y/G/B) for the electric pressures in the following situations.

Also, indicate how bright the bulbs are in the circuit.

d

g

b

e

f

G

B

Dim Bulbs

Bright Bulbs

Out Bulbs

O

R

Answer explanation

Tags

NGSS.HS-PS2-5

Label the color of the wires in each circuit to show the correct color code (R/O/Y/G/B) for the electric pressures in the following situations.

Also, label the brightness of the bulbs.

d

h

a

Dim Bulb

Y

O

Bright Bulb

Out Bulb

G

R

B

Answer explanation

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

5. Use color-coding to determine the order of brightness of the bulbs in the circuits below. Rank the three bulbs — “A”, “B”, and “C” — from brightest to dimmest. All seven bulbs are identical.

c

d

e

a

b

f

B

Yellow

Orange

A

Blue

C

Answer explanation

1. 6. In terms of electric pressure, describe a “charged capacitor”.

• Higher-than-normal pressure on one plate because of excess charge

• Lower-than-normal pressure on one plate because of excess charge

• Lower-than-normal pressure on one plate because of depleted charge

• Higher-than-normal pressure on one plate because of depleted charge

Tags

NGSS.HS-PS2-4

7. In what direction is the conventional flow of charge considered to be?

• From low pressure to high pressure

• From negative to positive

• From high pressure to low pressure

• From positive to negative

8. Color-code the circuit diagram below, assuming that the capacitors are fully charged.

The bulbs are identical and the capacitors are identical.

a

b

Red

Blue

Answer explanation