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Physics QS 7 (Test 2)

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Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

VB + VC = VD

When the switch between the battery and bulb A is closed,

all bulbs will light at the same time.

When the switch between bulbs A and B is opened,

all four bulbs go out at the same time

When the switch between bulbs C and D is opened,

all four bulbs go out at the same time

A single light bulb is connected to a battery. Which of the following would cause the bulb to shine brighter?

both A and C (increase the voltage of the battery & increase the current through the bulb)

Kirchhoff's Junction Law/Rule is essentially a conservation of _____________ statement.

charge

As more lamps are put into a series circuit, the overall current from the power source

decreases

The diagram above depicts a couple of circuits containing a voltage source (battery pack), a resistor (light bulb) and an ammeter (for measuring current). In which circuit does the light bulb have the greatest resistance?

diagram A

As more and more cells are added in parallel to a circuit containing a single light bulbs, the brightness of the bulb

does not change

The brightness of a bulb depends on how much ____________________ is converted into light energy each second.

electrical energy

Kirchhoff's Loop Law/Rule is essentially a conservation of _____________ statement.

energy

What happens to bulb D if bulb B goes out?

gets brighter

What happens to bulb D if bulb C goes out?

gets brighter

What happens to bulb A if bulb C goes out?

gets dimmer

If 5 identical bulbs are connected in series and one bulb goes out, the other bulbs

go out completely

What happens to bulb C if bulb A goes out?

goes out completely

What happens to bulb C if bulb B goes out?

goes out completely

What happens to bulb D if bulb A goes out?

goes out completely

When otherwise identical light bulbs are connected in a combination circuit, the brightest bulb will be the bulb

having the most current flowing through it.

Which of the following relationships is true?

i2 + i3 = i4

Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

iA + iB = iC + iE

Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

iE = iD + iC

As more and more cells are added in series to a circuit containing a single light bulbs, the brightness of the bulb

increases

Compared to the total current in a circuit when a single lamp is connected to a battery, the total current in a circuit when two identical lamps are connected in series to the same battery will be

less current

When two lamps are connected in parallel to a battery, the total electrical resistance that the battery senses is

less than the resistance of either lamp.

When two lamps are connected in series to a battery, the total electrical resistance that the battery senses is

more than the resistance of either lamp

Connect a pair of lamps in series and you draw a certain total current from the connected battery. Connect the same lamps in parallel and you draw

more total current

When the switch between bulbs B and C is closed,

no bulbs will light

As more lamps are put into a series circuit, the overall potential difference from the power source

stays the same

Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is

the same

When a switch is closed and a battery causes a light bulb to glow, the electrons in the circuit that caused the bulb to light

were already present in the bulb