A simple DC motor with a coil of wire is placed in a uniform magnetic field. Which of the following actions will decrease the torque experienced by the coil?
Increasing the strength of the external magnetic field.
Decreasing the current flowing through the coil.
Increasing the number of loops of wire in the coil.
Using a split-ring commutator.
Marking your answer...
This may take a few seconds
Sign up for free to see your full marking breakdown and personalised study recommendations.
Create Free Account Log inThis is a free VCE Units 3 & 4 Physics practice question worth 1 mark, testing your understanding of Motor torque factors. It falls under How do things move without contact? 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 examine the similarities and differences between three fields: gravitational, electric and magnetic. Students explore how positions in fields determine the potential energy of, and the force on, an object. They investigate how concepts related to field models can be applied to construct motors, maintain satellite orbits and to accelerate particles including in a synchrotron.
Investigate, qualitatively, the effect of current, external magnetic field and the number of loops of wire on the torque of a simple motor.
All free, all instant AI marking.
A student builds a simple DC motor for a science project. They observe that the motor spins, but with very little force. State and explain t…
An engineering team is designing a high-torque DC motor for a robotic arm used in an automated manufacturing process. The motor needs to pro…
A student is designing a simple DC motor to power a miniature water pump for a hydroponics system. The motor consists of a single coil with…
A student is investigating the factors affecting the torque produced by a simple DC motor. The motor consists of a coil with multiple loops…
A simple DC motor is constructed with a coil of wire placed in a uniform magnetic field. Which of the following changes will *always* result…
A student is investigating the factors affecting the torque of a simple DC motor. The motor consists of a coil with multiple loops of wire p…
StudyPulse has thousands of VCE Physics questions with full AI feedback, mark breakdowns, progress tracking, and study notes across every Key Knowledge point including Motor torque factors.
