EMF_U2_Biot Savart's Law and Ampere's Circuit law

Magnetic effect of electric current was first proposed by

• Ampere

• Maxwell

• Oersted

• Rutherford

The direction of magnetic field produced around the conductor is given by

• Right hand clasp rule

• Fleming's left hand rule

Magnetic field lines due to straight wire carrying current are

• circular

• straight

• parabolic

• elliptical

Magnets can interact without touching.

• True
• False

What happens when two north poles of a magnet are placed together?

• they repel
• they attract
• they cancel each other out
• the strength of the magnet is doubled

A north pole and a south pole will attract.

• True
• False

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

• calculator

• ruler

• compass

• map

Dylan puts two magnetic toy trains very close to each other on a track. What will happen next, and why?

• The trains will not move because the magnets are not touching.

• The trains will move closer to each other because the magnetic force will pull the trains together.

• The trains will move away from each other because the magnetic force will push the trains apart.

• The trains will move away from each other because the magnets are not touching.

True or False: A magnet is attracting when it pushes objects away from each other.

• True
• False