WorksheetsGP2_QuizNo2_Magnetic Fields & Magnetic Force
Total questions: 18
Worksheet time: 18mins
A magnet attracts ______________.
all metals
iron, zinc, and tin
iron, cobalt, and nickel
paper, wood, cork
The strength of a magnet is _____________.
greatest in the middle
greatest at the poles
the same all over
greatest at only one end
A magnet can be made by _______________.
heating an iron nail
rubbing an iron nail with a magnet
placing an iron nail in the earth
striking an iron nail
When a bar magnet is broken in half, _____________.
it loses its magnetism
both halves are magnets
one half has one pole and the other half has another pole
one half has two south poles and the other half has two north poles
Magnets lose their magnetism when they are ____________.
heated
cooled
put in water
broken into pieces
All magnets are characterized with _____________.
two south poles
a shape like a bar
permanent magnetism
a magnetic field around them
The total magnetic flux through a closed surface is _____________.
always maximum
dependent on the size of the closed surface
infinite
zero
A compass points to _____________.
magnetic north
geographic east
geographic north
magnetic east
The motion of a charged particle under the action of a magnetic field alone is always motion with ______________.
constant force
constant speed
constant velocity
constant acceleration
The magnetic force on a current-carrying conductor depends on the following EXCEPT
current flowing in the conductor
length of the conductor
mass of the conductor
magnetic field
A straight wire of length 70 cm carries a current of
50 A and makes an angle of 60° with a uniform
magnetic field. If the force on the wire is 1.0 N what is
the magnitude of B?
20mT
22mT
30mT
33mT
Two long, straight wires are fixed parallel to one
another a distance 𝑑 apart. The wires carry equal
constant currents 𝐼 in the same direction. The
attractive magnetic force per unit length between
them is 𝑓 = 𝐹/𝐿. What is the force per unit length
between the wires if their separation is 2𝑑 and each
carries current 2𝐼?
𝑓/4
3𝑓/2
2𝑓
𝑓/2
Two long parallel wires have currents of 𝐼3 and 𝐼6
6
and are a distance 𝑑 apart. The force per unit length
exerted by one wire on the other is 𝐹/𝐿. The current
in each wire is doubled, and the distance between the
wires is reduced to 𝑑/2. The new force per unit length is
𝐹/2𝐿
8𝐹/𝐿
2𝐹/𝐿
4𝐹/𝐿
Two long, parallel wires each carry the same
current 𝐼 in the same direction. What is the total
magnetic field at the point 𝑃 midway between the
wires?
Zero
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What is the symbol for magnetic field strength?
T
M
B
F
What is the unit for magnetic field strength?
T
M
B
F
The earth is called a "giant magnet". Why do you think this is true?
