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Frage 1
Frage
What is magnetism?
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Invisible lines of pressure
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Invisible lines of force
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Invisible lines of power
Frage 2
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The magnetic materials are:
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Steel
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Iron
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Copper
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Silver
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Nickel
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Cobalt
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Aluminium
Frage 3
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You can increase the strength of an electromagnet by increasing the strength of the [blank_start]current[blank_end] and the [blank_start]number of windings[blank_end].
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current
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number of windings
Frage 4
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What is voltage?
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A measure of pressure
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A measure of force
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A measure of current
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A measure of electrical energy
Frage 5
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What is current?
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The rate of flow of electrons
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How many windings there are on the electromagnet
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The strength of the commutator
Frage 6
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What is Resistance?
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Current multiplied by voltage
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A measure of how much the flow is prevented
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A measure of the time it takes for the electric motor to reach its full capacity
Frage 7
Frage
What is given off when current passes through a resistor?
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Force
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Steam
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Smell
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Heat
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Vibration
Frage 8
Frage
A current passes through a resistor of 25 Ohm's with 100 volts. What is the strength of the current?
Antworten
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2 amps
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3 amps
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4 amps
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5 amps
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6 amps
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