Transport critical current density J_c^J is investigated as a function of the external magnetic field perpendicular to a sample surface, and the trapped magnetic field and magnetization in a remanent state after removal of external field are also investigated at 77K on screen-printed Ag-Bi2223 composite tape. The hysteresis behavior in J_c^J between increasing and decreasing fields is observed in a zero-field-cooled sample and explained by the influence of trapped magnetic flux in the grains on intergranular (transport) current. Such hysteresis in J_c^J causes decreases in the trapped field and in magnetization with increasing B_ex, defined as the maximum field in a field loop for measuring J_c^J values. The experimental results give the full flux penetration field B_p for the grains to be nearly equal to 9mT. The use of a critical state model and the value of B_p=9mT results in the intragranular critical current density J_c^G being-5, 000A/mm², which is about 50 times higher than the transport critical current density (-85A/mm² at 77K and self-field) of the sample. The study shows that strong pinning in the grains does not lead to a high transport critical current density unless further improvements for grain connectivity are made.