9.5 Adding and removing Components [Mastery check]

All parts of the train move at the same __________ on the track. The back of the train cannot go __________ or slower than the front of the train. As soon as one part of the train moves, all of the train will move.

• speed, faster

• direction, slower

• length, faster

• height, slower

Electrons in a __________ circuit are like a train. When electrons start to flow in one part of the circuit, they all start to flow and they all flow at the same __________.

• series, speed

• parallel, speed

• open, direction

• closed, voltage

Ammeter at any position in a series circuit will give the __________ reading.

• same

• different

• zero

• maximum

Place the same components of a series circuit in a different order and the __________ will still be the same.

• current

• voltage

• resistance

• power

Cells and batteries are stores of __________ energy. In a complete circuit, the chemical energy gets changed to __________ energy. That means if you add more cells to a circuit, you have __________ chemical energy to change into electrical energy in the circuit.

• chemical, electrical, more

• electrical, heat, less

• mechanical, sound, equal

• thermal, light, no

Each component is identical in both circuits. The circuit with two cells compared to the circuit with one cell, has __________ the electrical energy, current is __________, the lamp will be __________.

• double, higher, brighter

• half, lower, dimmer

• the same, the same, the same

• triple, much higher, much brighter

Therefore, when the other components are kept the same, Adding more cells __________ the current, removing cells __________ the current.

• increases, decreases

• decreases, increases

• does not change, increases

• increases, does not change

8. Be careful adding more cells to a circuit, the lamps can be __________, the wires can get __________.

• brighter, hot

• dimmer, cold

• broken, loose

• fused, tangled

Electrons carry electrical energy around a circuit. When the electrons pass through a lamp, the electrons transfer some of their ____________ energy to the lamp. The lamp changes the electrical energy into ____________ energy and ____________ energy.

• chemical; light; heat

• kinetic; sound; magnetic

• thermal; electrical; nuclear

• potential; mechanical; sound

In the circuit with two lamps compared to one lamp circuit:

each lamp gains _______ electrical energy

• the electrons move more _______

• the electrons move at _______ the speed,

• so, the reading on the ammeter is _______

• the lamps will be _____________.

• less; slowly; half; lower; dimmer

• more; quickly; double; higher; brighter

• the same; randomly; unchanged; the same; unchanged

• less; quickly; double; higher; brighter