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Pregunta 1
Pregunta
What is magnetism?
Respuesta
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Invisible lines of pressure
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Invisible lines of force
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Invisible lines of power
Pregunta 2
Pregunta
The magnetic materials are:
Respuesta
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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
Pregunta 3
Pregunta
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].
Respuesta
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current
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number of windings
Pregunta 4
Pregunta
What is voltage?
Respuesta
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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
Pregunta 5
Pregunta
What is current?
Respuesta
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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
Pregunta 6
Pregunta
What is Resistance?
Respuesta
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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
Pregunta 7
Pregunta
What is given off when current passes through a resistor?
Respuesta
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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
Pregunta 8
Pregunta
A current passes through a resistor of 25 Ohm's with 100 volts. What is the strength of the current?
Respuesta
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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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