438 prompts matching "Efficiency, and why no machine is perfect"
WAEC prep: Transformer energy losses and how they are reduced
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on transfor
Spot my mistake: A transformer calculation with the ratio inverted
Act as my SS3 Physics tutor. Show me a worked solution on a transformer calculation with t
Real-life Nigeria: Step-down transformers on Nigerian distribution poles
Act as my SS3 Physics tutor. Show me where step-down transformers on Nigerian distribution
Worked example: Choosing a core material from hysteresis data
Act as my SS3 Physics tutor. Show me a full worked example on choosing a core material fro
WAEC prep: Soft and hard magnetic materials and their uses
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on soft and
Spot my mistake: Choosing a hard magnetic material for a transformer core
Act as my SS3 Physics tutor. Show me a worked solution on choosing a hard magnetic materia
Real-life Nigeria: Magnets in loudspeakers and electric generators
Act as my SS3 Physics tutor. Show me where magnets in loudspeakers and electric generators
WAEC prep: The cathode ray and its properties
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on the cath
Spot my mistake: Confusing electron flow with conventional current
Act as my SS3 Physics tutor. Show me a worked solution on confusing electron flow with con
Real-life Nigeria: Neon signs and fluorescent tubes
Act as my SS3 Physics tutor. Show me where neon signs and fluorescent tubes turns up in Ni
Let me explain: The structure of a fibre: core, cladding and coating
I have just studied the structure of a fibre: core, cladding and coating in my SS3 Physics
Practice set: Problems on signal loss and fibre geometry
Act as my SS3 Physics tutor. Give me five practice questions on problems on signal loss an
Spot my mistake: Assuming light bends round the fibre rather than reflecting
Act as my SS3 Physics tutor. Show me a worked solution on assuming light bends round the f
Practice set: Problems on laser output and photon count
Act as my SS3 Physics tutor. Give me five practice questions on problems on laser output a
WAEC prep: The uses and hazards of lasers
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on the uses
Spot my mistake: Treating laser light as simply very bright light
Act as my SS3 Physics tutor. Show me a worked solution on treating laser light as simply v
Real-life Nigeria: Lasers in surgery, printing and barcode scanning
Act as my SS3 Physics tutor. Show me where lasers in surgery, printing and barcode scannin
Physics at work: Laser and photonics work
Act as my SS3 Physics tutor. Explain which Nigerian jobs and industries depend on laser an
Let me explain: Checking an equation for dimensional consistency
I have just studied checking an equation for dimensional consistency in my SS3 Physics cla
Spot my mistake: A dimensional check that overlooks a dimensionless constant
Act as my SS3 Physics tutor. Show me a worked solution on a dimensional check that overloo