A circular coil with a radius of 10 cm is placed in a uniform magnetic field of 0.5 T. The coil is initially positioned so that the normal to its area is aligned with the magnetic field. The coil is then rotated by 90 degrees so that the plane of the coil is aligned with the magnetic field. Which of the following statements correctly describes the change in magnetic flux through the coil as a result of this rotation?
The magnetic flux remains constant because the magnetic field strength and area of the coil do not change.
The magnetic flux decreases from an initial value of \$0.016 \ Wb$ to a final value of \$0 \ Wb$.
The magnetic flux increases from an initial value of \$0 \ Wb$ to a final value of \$0.016 \ Wb$.
The magnetic flux decreases, but without further information, the exact change cannot be determined.
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Create Free Account Log inThis is a free VCE Units 3 & 4 Physics practice question worth 1 mark, testing your understanding of Magnetic flux basics. It falls under How are fields used in electricity generation? in Unit 3: How do fields explain motion and electricity?. Submit your answer above to receive instant AI-powered marking and personalised feedback.
In this unit students use Newton’s laws to investigate motion in one and two dimensions. They explore the concept of the field as a model used by physicists to explain observations of motion of objects not in apparent contact. Students compare and contrast three fundamental fields – gravitational, magnetic and electric – and how they relate to one another. They consider the importance of the field to the motion of particles within the field. Students examine the production of electricity and its delivery to homes. They explore fields in relation to the transmission of electricity over large distances and in the design and operation of particle accelerators. A student-designed practical investigation involving the generation of primary data and including one continuous, independent variable related to fields, motion or light is undertaken either in Unit 3 or Unit 4, or across both Units 3 and 4, and is assessed in Unit 4, Outcome 2. The design, analysis and findings of the investigation are presented in a scientific poster format.
In this area of study, students use empirical evidence and models of electric, magnetic and electromagnetic effects to explain how electricity is produced and delivered to homes. They explore the transformer as critical to the performance of electrical distribution systems in minimising power loss.
Calculate magnetic flux when the magnetic field is perpendicular to the area, Φ = BA, and describe the qualitative effect of differing angles between the area and the field.
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