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Worksheetsmagnetic effects of electric current
Total questions: 10
Worksheet time: 6mins
Name
Class
Date
1.
The magnetic field lines are__________.
a)
closed curves
b)
open curves
c)
semi circular
2.
The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
a)
false
b)
true
c)
can't say
3.
No two field-lines are found to cross each other.
a)
true
b)
false
4.
Fuse wire has high melting point. True or False:
a)
True
b)
False
c)
May be false
d)
May be correct
5.
Which word means how hard it is for electrons to flow?
a)
Current
b)
Voltage
c)
Resistance
d)
Power
6.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
7.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
8.
What is the unit of power?
a)
Ohms
b)
Volts
c)
Amps
d)
Watts
9.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
10.
Where is Earth's magnetic field the strongest?
a)
poles
b)
equator
c)
mountain tops
d)
ocean floor
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