Module 7: DC Circuits Flashcards
1
Q
- The brightness will decrease momentarily then return to its previous level.
- The brightness increases permanently.
- The brightness will increase momentarily then return to its previous level.
- The brightness remains the same as before the switch is closed.
- The brightness decreases permanently.
A
- The brightness increases permanently.
2
Q
- none of the above
- +4 V - (8Ω) i2 - (12Ω) i1 = 0 V
- -(8Ω) i2 + 4 V + 6 V + (12Ω) i1 = 0 V
- +6 V - (12Ω) i1 - (8Ω) i2 + 4 V = 0 V
- -6 V + 2 V - (6Ω) i3 = 0 V
A
- +6 V - (12Ω) i1 - (8Ω) i2 + 4 V = 0 V
3
Q
A
A
4
Q
A
y, x, z
5
Q
A
X
6
Q
T or F: If a 75 W bulb and a 100 W bulb are connected in series across a 120 V outlet, the 75 W bulb will dissipate 75 W of power and the 100 W bulb will dissipate 100 W of power.
A
F
7
Q
- B and C have equal brightness, and A is the dimmest.
- A and B have equal brightness, and C is the dimmest.
- A is brightest, C is dimmest, and B is in between.
- A is the brightest, and B and C have equal brightness but less than A.
- All three bulbs have the same brightness.
A
- A is the brightest, and B and C have equal brightness but less than A
8
Q
- closing both switches
- closing S1 only
- closing S2 only
- leaving both switches open as shown
A
- closing both switches
9
Q
A light bulb is connected in the circuit shown in the figure with the switch S open and the capacitor uncharged. The battery has no appreciable internal resistance. Which one of the following graphs best describes the brightness B of the bulb as a function of time t after closing the switch?
A
2
10
Q
- I1 + I3 = I6 + I4
- I4 + I3 = I6
- I1 + I2 = I6 + I4
- I2 = I6 + I4
- I6 + I5 = I1
A
- I1 + I2 = I6 + I4
11
Q
- E2 + R3I3 + E3 - R2I2 = 0
- E2 + R3I3 - E3 + R2I2 = 0
- E2 - R3I3 - E3 - R2I2 = 0
- E2 + R3I3 + E3 + R2I2 = 0
- -E2 + R3I3 - E3 + R2I2 = 0
A
- E2 + R3I3 - E3 + R2I2 = 0
12
Q
A
