Electromagnet | Baamboozle - Baamboozle | The Most Fun Classroom Games!

What rule is used to determine the relative directions of force, field, and "induced current"?

Fleming’s Right-Hand Rule

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How can you increase the induced e.m.f.?

Move the conductor or magnet faster.

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A transformer has 800 turns on the primary coil and 200 turns on the secondary coil. The input voltage is 240 V. Calculate the output voltage.

60V

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What is the function of slip rings and brushes in an a.c. generator?

To allow current to flow out of the rotating coil while keeping the connections continuous.

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Which other factors can increase the induced e.m.f. apart from moving the conductor faster?

Use a stronger magnet or more turns in the coil. /

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Which law related to this statement "The direction of the induced e.m.f. always opposes the change that causes it" ?

Lenz’s Law

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A step-up transformer increases the voltage from 12 V to 240 V. If the secondary coil has 1000 turns, calculate the number of turns on the primary coil.

50 turns

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How can you find the direction of the magnetic field around a current-carrying wire?

By using the right-hand grip rule.

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What shape is the magnetic field around a straight wire carrying current?

Concentric circles around the wire.

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How can you increase the turning effect on a current-carrying coil?

By increasing the number of turns on the coil / increasing the current, / increasing the strength of the magnetic field.

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lifesaver

Give 20 points!

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gift

Win 25 points!

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shark

Other team loses 25 points!

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lifesaver

Give 15 points!

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What is the main part that rotates in a simple a.c. generator?

A wire coil rotates in a magnetic field.

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eraser

Reset score!

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shark

Other team loses 10 points!

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rocket

Go to first place!

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thief

Give points!

baam

Lose 20 points!

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shark

Other team loses 25 points!

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shark

Other team loses 20 points!

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baam

Lose 25 points!

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An ideal transformer has a primary voltage of 230 V and supplies a current of 2 A. The secondary voltage is 115 V. Calculate the current in the secondary coil.

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lifesaver

Give 15 points!

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shark

Other team loses 20 points!

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fairy