Motor and Generator Effect | Baamboozle - Baamboozle

Please state the best description how a loudspaker is construced !

an electromagnet, a permanent magnet and a vibrating paper cone

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The secondary coil of a step-down transformer has 100 turns and produces 2 V. What is the number of turns required for a transformer connected to a 10 V supply?

500

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A transformer is said to be 100% efficient. Describes the relationship between power output and power input for the transformer

power input is equal to power output

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banana

Go to last place!

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rocket

Go to first place!

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shark

Other team loses 10 points!

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baam

Lose 20 points!

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A current carrying wire establishes a magnetic field around the wire. How can the magnetic field be increased?

increase the current through the wire, increase the number of loop in the coil, use stronger magnet

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A transformer is connected to a 230 V mains supply, 0.25 A. The voltage output on the secondary coil is 12 V. What is the current through the secondary coil?

4.8 Ampere

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banana

Go to last place!

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gold

Win 50 points!

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shark

Other team loses 20 points!

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thief

Give points!

A transformer is connected to a 12 V supply. The voltage output on the secondary coil is 2 V, with a current of 2.0 A. What is the current through the primary coil?

0.33 Ampere

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What is the role of the split-ring commutator in an electric motor?

Reverse the direction of current for every half turn.

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How can the speed of an electric motor be increased?

Increase the current, increase the number of turn in coil, increase the strength of magnetic field.

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Add labels to the empty boxes and identify the parts indicated !

Upper box : Split ring commutator, Lower box : Brushes

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monster

Reset all scores!

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rocket

Go to first place!

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shark

Other team loses 25 points!

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baam

Lose 25 points!

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How is a uniform magnetic field represented?

with equally spaced straight lines between opposite poles.

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The primary coil on a step-up transformer has 500 coils and is connected to a 12 V supply. What is the output voltage if the secondary coil has 2000 turns?

48 Volt

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The coil rotates in a clockwise direction when viewed from point P. State which of the magnetic poles, X or Y, is the N-pole

X is the north pole

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A transformer has a soft iron core. Describes why the core must be magnetically soft?

Magnetically soft iron means it can become demagnetised as the current switches direction and then re-magnetised with the field in the opposite direction.

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