ELECTR

ICIT

Y AND

MAGNETISM

SE

RI E

S V

S P

AR

AL L E

L CI R

CU

I TS

WARM-UP

How is electricity transferred to your home?

SERIES CIRCUIT AND PARALLEL CIRCUIT

SERIES CIRCUIT: VOCABULARY

Circuit – Components: Battery, wire, resistor (light bulb, etc), switch

Electrons – tiny, negatively charged particles

Current

Voltage

Resistance

CIRCUITS GIZMO: ACTIVITY A

Explorelearning.com

SERIES CIRCUIT AND PARALLEL CIRCUIT

SERIES CIRCUIT: VOCABULARY

Series Circuit – a circuit in which the current flows in a single line, so that all resistance in the circuit has the same current flowing through it.

Components: Battery, wire, resistor (light bulb, etc), switch

Electrons – a negatively charged sub atomic particle

Current –

SERIES CIRCUIT: VOCABULARY

Voltage – the energy (in joules) for each coulomb of charge

Resistor – an electronic device that opposes (provides resistance) to an electric current; measured in ohms

Ohm’s Law – as the voltage increases at a fixed rate the current increases at the same rate; R = V/I

SERIES CIRCUIT

PARALLEL CIRCUIT

SERIES CIRCUIT: VOCABULARY

Series Circuit – a circuit in which the current flows in a single line, so that all resistance in the circuit has the same current flowing through it.

Components: Battery, wire, resistor (light bulb, etc), switch

Electrons – a negatively charged sub atomic particle

Current – the rate of flow of electric charge

SERIES CIRCUIT: VOCABULARY

Voltage – the energy (in joules) for each coulomb of charge

Resistor – an electronic device that opposes (provides resistance) to an electric current; measured in ohms

Parallel Circuit – A circuit that provides separate paths for current to travel through each resistor; the same voltage is provided across each resistor

DIRECT CURRENT VERSUSALTERNATING CURRENThttp://youtu.be/xyQfrzBfnDU

ELECTRICITY VOCABULARY

Conductor – a material through which electric current can move easily; metals are good conductors

Insulator – a material through which electric current cannot move easily; air, glass, plastic, rubber, and wood are examples of insulators

Fuse – a device placed in an electrical circuit that melts when too much current flows through it, thereby breaking the circuit; it protects the other parts of the circuit from damage due to too much current

PRACTICE PROBLEMS

1. Given a 1.5 V battery and a resistance of 20 ohms in a circuit, what is the current?

2. A voltage of 24 V is applied to a 150 ohm resistor. How much current flows through the resistor?

3. Determine the resistance of a bulb operating on 95 V if the current flowing through it is 0.78 A.

4. An 800 W microwave oven operates on a household circuit of 120 V, what is the resistance in the microwave?

5. A 26 V battery sustains a constant current through a resistance of 12 ohms, what is the current in the circuit?