Is it worse to fail at something or never attempt it in the first place?
In my opinion, philosophy has no correct answer. But it is always better to try/attempt at the problem, because you never know the boundaries of your potential.
If f(x) is a linear function and 0<a<b evaluate integral a to b of f''(x).dx
f(x) is linear -> f(x) = mx + c -> f'(x) = m -> f''(x) = 0 therefore required integral is 0.
For a transformer with turns ratio of 1:20, what will the output voltage be, if DC input voltage is 20V .
DC has0 frequency, therefore transformer coil will behave like a short circuit having very low resistance. A huge current flow and transformer winding will burn.