True or false: about Transformers

Thread starter PaulK
Start date Jun 10, 2011
Tags

Transformers

AI Thread Summary

When an alternating voltage is applied across the primary coil of a transformer, an electromotive force (emf) is indeed induced in the secondary coil, making the first statement true. This induced emf leads to an alternating current in the secondary coil, confirming that the second statement is also true. The operation of transformers is based on Faraday's law of electromagnetic induction, which explains how changing magnetic fields generate voltage. Key equations include the transformer equation, which relates primary and secondary voltages and turns ratios. Understanding these concepts is essential for grasping transformer functionality.

Jun 10, 2011

PaulK

1. when an alternating voltage is applied across the primary coil, an emf is induced in the secondary coil
2. when an alternating voltage is applied across the primary coil, an alternating current is induced in the secondary coilcan anyone tell me which one is true and why?

Thanks a lot.

Physics news on Phys.org

Jun 10, 2011

wbandersonjr

What do you think? What equations do you know that are relevant? What concepts are relevant?

Thread 'I've come across another fluid pressure problem I don't understand'

Neglect gravity other than that of water; neglect friction. F1=ρgsh=1000*10*1*(1+4)=50000 N; F1=ρgsh=1000*10*0.1*4=4000 N; F3=50000-4000=46000 N?

View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...

View full post »

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...

View full post »