Magnetic Field Review

An electric current passing through a copper wire at constant temperature would result in

• 1. an increase in the resistivity of the wire

• 1. a decrease in the resistivity of the wire

• 1. the emission of protons from the wire

• he production of a magnetic field around the wire

Tags

NGSS.HS-PS2-5

The diagram below shows a magnetic compass placed between unlike magnetic poles. The north pole of the compass needle will point toward:

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student sprinkles iron filings on a clear sheet of plastic. The student then places the sheet of plastic on top of a bar magnet and taps the edge. The iron filings take the shape shown. Where is the magnetic force on the iron filings strongest and how do you know?

• 1. region A because it is closest to the magnetic pole

• 1. region B because it is in the direct center of the magnet

• 1. region C because the iron filings form a curved line there

• 1. region D because it is the greatest distance from the poles

Tags

NGSS.HS-PS3-5

In the diagram shown, the shaded region represents a part of a field around a negatively charged particle. Four positions in this region are numbered. To which numbered position should a positively charged particle be placed in order to maximize the strength of the electric force acting on the particle?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS3-5

The diagram below represents a wire that is not part of a complete circuit, just above the poles of two magnets. Moving the wire downward between the poles in the direction shown in the diagram will

• 1. induce an alternating magnetic field between the poles of the magnets

• 1. induce a potential difference between the ends of the wire

• 1. decrease the wire’s resistivity

• 1. reverse the direction of the magnetic field

Tags

NGSS.HS-PS2-5

An electron in a magnetic field travels at constant speed in the circular path represented in the diagram below. Which arrow represents the direction of the net force acting on the electron when the electron is at position A?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A small object is dropped through a loop of wire connected to a sensitive ammeter on the edge of a table, as shown in the diagram below. A reading on the ammeter is most likely produced when the object falling through the loop of wire is a

• 1. flashlight battery

• 1. bar magnet

• 1. brass mass

• 1. plastic ruler

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5