Current Electricity and Magnetism

A string of lights is lit.  They are part of a series circuit.  One of the bulbs is removed.  The rest of the lights will

• go out

• stay lit

• get brighter

• get dimmer

To complete a circuit the switch must be

• unattached

• open

• closed

Where is the strongest attraction force of the magnet?

• at the poles

• in the middle

• above the magnet

• below the magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is part C considered in the circuit?

• power source

• conductor

• load/resistor

What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?

• 25 V

• 10 V

• 2.5 V

• 0.4 V

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm

• 3 Ohms

• 4 Ohms

• 12 Ohms

The picture shows an electrical circuit. This circuit is a series circuit because:

• It has 3 light bulbs.

• The same current flows through all three light bulbs.

• It uses a single battery.

• The electrical current has more than one path to flow through

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C

• Point B to Point C

• Point A to Point D

• Point B to Point D

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery

• the buzzer is made of special plastic

• the wires are cooled by the surrounding air

• electricity can flow in a complete path

Tags

NGSS.4-PS3-2

A student is investigating how changing the size of the core of an electromagnet affects its strength.  Which of these is most likely the dependent variable in the student's investigation?

• the number of wire coils wrapped around the core

• the number of paper clips picked up by the electromagnet

• the voltage of the battery used in the circuit

• the size of the piece of iron used as the core