Question detail

A transformer is used in a loudspeaker cone test cause situation. The primary coil is connected to 240 V and 5 A. The secondary voltage is 600 V. Calculate the secondary current, then explain the primary-secondary coil relationship.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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Topic

Permanent and induced magnetism, magnetic forces and fields

Question

A transformer is used in a loudspeaker cone test cause situation. The primary coil is connected to 240 V and 5 A. The secondary voltage is 600 V. Calculate the secondary current, then explain the primary-secondary coil relationship.

Answer

2 A. Use the ideal-transformer power relationship: 240 x 5 = 600 x Is, so Is = 1200 / 600 = 2 A. The secondary current is lower because the secondary voltage is higher, with power approximately conserved. Retrieval anchor: fluxcue135a coilcue135b fieldcue135c polecue135d gridcue135e motorcue135f generatorcue135g transformercue135h compasscue135i currentcue135j voltagecue135k forcecue135l.

Explanation

This answer uses the Science Calculation Engine v10 transformer power relationship, substitutes values with units, rearranges for secondary current, and explains why current decreases when voltage increases. V10 boundary check fluxcue135a coilcue135b fieldcue135c polecue135d gridcue135e motorcue135f generatorcue135g transformercue135h compasscue135i currentcue135j voltagecue135k forcecue135l: in the motor effect, the force is perpendicular to the current and magnetic field; in a generator, relative motion or a changing magnetic field induces a potential difference or induced current; outside a magnet, magnetic field lines go from north to south; AC alternating current changes direction, while DC direct current flows in one direction and needs a commutator in a DC generator context.

Common mistake

generator-effect induction: avoid permanent and induced magnets

Treating permanent and induced magnets as interchangeable when answering about generator-effect induction.

Instead, identify the exact Unit 4.7 idea in Poles of a magnet, then explain how it links to an alternator producing an AC output trace and the objective to describe attraction and repulsion between magnetic poles as non-contact forces.

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