SPH3U Unit 5 Magnetic effects of electric current

Who was the first to observe the magnetic effect of electric current?

• Faraday

• Oersted

• Volta

• Ampere

The magnetic field lines due to a straight wire carrying a current are

• straight

• circular

• parabolic

• elliptical

The magnetic field lines near a long straight wire carrying current are:

• Straight lines

• Concentric rings

• Spiral lines

• Radial lines

Name the device which converts mechanical energy into electric energy

• Motor

• Generator

• Heater

• Transformer

Which of the following is not the source of magnetic field:

• Moving charge

• Electric current

• Magnet

• A small piece of iron

According to right hand thumb rule the direction of magnetic field in a current carrying straight conductor is denoted by:

• Thumb

• Curl fingers

• Middle finger

• First finger

According to right hand thumb rule the direction of magnetic field in a current carrying circular coil is denoted by

• Thumb

• Middle finger

• Curl finger

• First finger

Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• Directed to the right

• Directed to the left

• Equal to the magnetic field

• n the same direction as the magnetic field

The magnetic field produced by a given current in the conductor ___________ as the distance from it increases.

• decreases

• increases

• remains same

• none

The entire region surrounding a magnet is known as the:

• Magnetic Domain

• Lodestone

• A Compass

• Magnetic Field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5