Podcast
Questions and Answers
What happens if the flux linking a coil changes?
What happens if the flux linking a coil changes?
- Permeability in a vacuum increases
- Flux density decreases
- The coil size increases
- An emf is induced in the coil (correct)
How can the flux linking a coil be changed?
How can the flux linking a coil be changed?
- By changing the size of the coil (correct)
- By increasing the coil size
- By decreasing the magnetic field intensity
- By adjusting the coil's resistance
According to Lenz's Law, what is the direction of the induced emf when the current through a coil increases?
According to Lenz's Law, what is the direction of the induced emf when the current through a coil increases?
- It opposes the increase in current (correct)
- It remains constant
- It is perpendicular to the coil
- It aids the increase in current
What does the equation e = dΦ / dt represent?
What does the equation e = dΦ / dt represent?
How is flux linkage calculated for an 'N' turns coil?
How is flux linkage calculated for an 'N' turns coil?
What is the torque experienced by a current-carrying coil when placed in a uniform magnetic field?
What is the torque experienced by a current-carrying coil when placed in a uniform magnetic field?
What is the magnetic moment of a coil with 'n' turns carrying current 'i' and area 'A'?
What is the magnetic moment of a coil with 'n' turns carrying current 'i' and area 'A'?
In the context of magnetic fields, what does the permeability in a vacuum represent?
In the context of magnetic fields, what does the permeability in a vacuum represent?
What is the relationship between the current 'i' and the magnetic field 'B' according to the right-hand screw rule?
What is the relationship between the current 'i' and the magnetic field 'B' according to the right-hand screw rule?
How is the magnetic moment 'pm' related to the area 'A' and current 'i' of a loop?
How is the magnetic moment 'pm' related to the area 'A' and current 'i' of a loop?
What is the formula for the magnetic force 'F' experienced by an elementary length of conductor 'dl' carrying current 'i' in a magnetic field 'B'?
What is the formula for the magnetic force 'F' experienced by an elementary length of conductor 'dl' carrying current 'i' in a magnetic field 'B'?
What is the relationship between magnetic flux density (B) and magnetic field intensity (H) in a vacuum?
What is the relationship between magnetic flux density (B) and magnetic field intensity (H) in a vacuum?
Which physical property is intermediate between electric currents and flux density when considering magnetic flux produced by electric currents?
Which physical property is intermediate between electric currents and flux density when considering magnetic flux produced by electric currents?
What does Ampere’s Circuital Law relate to magnetic flux intensity (H) and the current producing it?
What does Ampere’s Circuital Law relate to magnetic flux intensity (H) and the current producing it?
If a closed path around a current-carrying conductor is a circle of radius r, what is the expression for the magnetic field intensity (H)?
If a closed path around a current-carrying conductor is a circle of radius r, what is the expression for the magnetic field intensity (H)?
Which statement is true about the relationship between vectors B and H?
Which statement is true about the relationship between vectors B and H?
What does magnetic flux in a vacuum depend on?
What does magnetic flux in a vacuum depend on?
