[en] It is well established that parity(P) as well as the combined operation of parity and charge conjugation(C) are violated in weak interactions, while CPT is conserved which imply the violation of time reversal(T). Studied herewith is the T-invariance and violation in the antineutrino and electron induced single hyperon production through the polarization measurements of hyperons. Also studied is the photon induced associated particle production form the proton target, some of the results of which have also been presented. In the era of precision experiments with electron, neutrino and antineutrino beams, it is possible to get information on the second class current with and without T-invariance in the quasielastic reactions specially in the strangeness sector