Standard Brightness

Series

Which bulb, if either, in a series circuit is brighter? A.first bulb B.second bulb C.They have equal brightness.

The brightness of bulbs in series ___ the standard brightness. A.is dimmer than B.have the same brightness as C.is brighter than

The current from the battery with the bulbs in series is ____ than the standard current? A.less than B.equal to C.greater than

The resistance in the circuit with the bulbs in series is ____ that the standard resistance. A.less than B.equal to C.greater than

Parallel

Which bulb, if either, in a parallel circuit is brighter? A.left bulb B.right bulb C.They have equal brightness.

The brightness of bulbs in parallel ___ to the standard brightness. A.is dimmer than B.is the same brightness as C.is brighter than

The current from the battery with the bulbs in parallel is ____ than the standard current. A.less than B.equal to C.greater than

The resistance in the circuit with the bulbs in parallel is ____ that the standard resistance. A.less than B.equal to C.greater than

circuit 1 A) circuit 1 circuit 2 B) circuit 2 both the same C) both the same it depends on R D) it depends on R The lightbulbs in the circuit below are identical with the same resistance R. Which circuit produces more light? (brightness  power)

A) increases B) remains the same C) decreases D) drops to zero Points P and Q are connected to a battery of fixed voltage. As more resistors R are added to the parallel circuit, what happens to the total current in the circuit?

9 V Assume that the voltage of the battery is 9 V and that the three resistors are identical. What is the potential difference across each resistor? A) 12 V B) zero C) 3 V D) 4 V E) you need to know the actual value of R

12 V R 1 = 4  R 2 = 2  In the circuit below, what is the voltage across ? In the circuit below, what is the voltage across R 1 ? A) 12 V B) zero C) 6 V D) 8 V E) 4 V

In the circuit to the right, what is the current through ? In the circuit to the right, what is the current through R 1 ? 10 V R 1 = 5  R 2 = 2  A) 10 A B) zero C) 5 A D) 2 A E) 7 A

E F G

Which bulbs are the brightest? A.E B.F C.G D.F & G E.E, F & G

Which bulbs are the dimmest? A.E B.F C.G D.F & G E.E, F & G

What happens to the brightness of bulb F if I unscrew bulb E? A.goes out B.gets dimmer C.stays the same D.gets brighter

What happens to the brightness of bulb E if I unscrew bulb F? A.goes out B.gets dimmer C.stays the same D.gets brighter

What happens to the brightness of bulb G if I short circuit bulb F? A.goes out B.gets dimmer C.stays the same D.gets brighter

What happens to the brightness of bulb F if I short circuit bulb E? A.goes out B.gets dimmer C.stays the same D.gets brighter

A 10  bulb and a 20  bulb are connected in series. Which bulb is brighter? A)The 10  B)The 20  C)They are the same brightness

A 10  bulb and a 20  bulb are connected in parallel. Which bulb is brighter? A)The 10  B)The 20  C)They are the same brightness

1. The brightest bulb is a) A b) B c) C d) De) A and B

The dimmest bulb is a) A b) B c) C d) De) A and B

Which bulb has the least voltage across it? a) A b) B c) C d) De) B and C