SCIENCE PHYSICS (Chpt13 - Electricity)

Question 1

electric circuit

Answer 1

• complete path to travel required by electricity
• electric circuit: a set of electrical components connected with one another to provide one or more complete paths for movement of electric charges

Question 2

power source (component)

Answer 2

to produce energy source to drive electricity in circuit

e.g. battery

Question 3

conductors (component)

Answer 3

to provide path for electric charge to flow through the components in circuit

e.g. copper wire

Question 4

electrical device (component)

Answer 4

transfers energy from power source to device

e.g. bulbs, fans, resistors

Question 5

electric charge (component)

Answer 5

carried by charged particles (e.g. electrons, ions) that move within connecting wires

e.g. positive charge, negative charge

Question 6

circuit diagram

Answer 6

a drawing to represent circuit using electrical symbols

–> used to present components and connections of a circuit in a clear and simple way

Question 7

cell (circuit diagram)

Answer 7

refer to GLM LowerSec assessment book PAGE 138

Question 8

battery (circuit diagram)

Answer 8

refer to GLM LowerSec assessment book PAGE 138

Question 9

bulb/lamp (circuit diagram)

Answer 9

refer to GLM LowerSec assessment book PAGE 138

Question 10

open switch (circuit diagram)

Answer 10

refer to GLM LowerSec assessment book PAGE 138

Question 11

closed switch (circuit diagram)

Answer 11

refer to GLM LowerSec assessment book PAGE 138

Question 12

resistor (circuit diagram)

Answer 12

refer to GLM LowerSec assessment book PAGE 138

Question 13

variable resistor/ rheostat (circuit diagram)

Answer 13

refer to GLM LowerSec assessment book PAGE 138

Question 14

voltmeter (circuit diagram)

Answer 14

refer to GLM LowerSec assessment book PAGE 138

Question 15

ammeter (circuit diagram)

Answer 15

refer to GLM LowerSec assessment book PAGE 138

Question 16

fuse (circuit diagram)

Answer 16

refer to GLM LowerSec assessment book PAGE 138

Question 17

open circuit

Answer 17

refer to GLM LowerSec assessment book PAGE 139 (for circuit diagram)

1) also called incomplete circuit
2) break created in circuit when:
a - switch is open
b - a device does not function normally in circuit even when switch is closed
3) gap prevents electric current from flowing through circuit

Question 18

closed circuit

Answer 18

refer to GLM LowerSec assessment book PAGE 139 (for circuit diagram

1) also called complete circuit
2) no break in circuit when:
a - switch is closed
b - all devices are working normally when switch is closed
3) electricity flows continuously through circuit

Question 19

arrangement: in series

Answer 19

refer to GLM LowerSec assessment book PAGE 139 (for circuit diagram)

–> electrical components are arranged one after another in single loop (only one path for electricity to flow through)

Advantage:
1) simple to build

Disadvantage:
1) when more devices added, overall resistance of circuit increases, reducing current flowing in circuit
2) when one device becomes faulty, other also stop working
–> faulty device creates break in circuit, resulting in open circuit
–> hence, electricity cannot pass through it anymore

Question 20

arrangement: in parallel

Answer 20

refer to GLM LowerSec assessment book PAGE 140 (for circuit diagram)

–> electrical components are arranged in multiple loops or branches
= more than one path for electricity to flow through
–> parallel circuit used in connection of circuits in households

Advantages:
1) when more loops added, overall resistance of circuit decreases
2) a faulty device on one path does not affect other paths
–> when one device becomes faulty, only causes break in its own path
–> rest of paths remain closed circuits
–> hence, electricity flows through them continuously