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

If a transformer has 200 turns on the primary coil, 50 turns on the secondary coil, and the primary voltage is 240 V, what is the secondary voltage?

60V

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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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When is the e.m.f. zero?

When the coil is vertical .

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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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When is the e.m.f. at its maximum value (peak or trough) — when the coil is horizontal or vertical?

When the coil is horizontal .

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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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What factors increase the strength of a solenoid’s magnetic field?

More turns of wire, larger current, and using an iron core.

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monster

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

Move the conductor or magnet faster.

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What can be used to show the magnetic field pattern around a wire?

Iron filings or a plotting compass.

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According to Fleming’s Left-Hand Rule, what does each finger represent?

(Y)Thumb → Force (motion) , (Z)First finger → Magnetic field , (X)Second finger → Current

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boom

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fairy

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State one difference between a permanent magnet and an electromagnet.

A permanent magnet always has a magnetic field, while an electromagnet produces a magnetic field only when current flows through it.

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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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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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eraser

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magnet

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gift

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