Question

the peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10 v. the d.c. conponent of the output voltage is

ans. 10/π

Answer 1

they would ask rms value if they would ask that
and the answer would be given by the following relation

Ripple factor is defined as the ratio of rms value of ac component to the dc component in the output.

Ripple factor

so the Vac = Vdc*r

and for finding Vac they would give the value of r.