2021 NECO PHYSICS ANSWERS
NECO PHYSICS ANSWERS ======================== PHYSICS OBJ 1-10: BCEDBECBAD 11-20: DEDCBEDCEA 21-30: DDAEBBCBBC 31-40: CEDBBCBEAE 41-50: BDEEDECCCD 51-60: BEECECDBCB =================== (1a) (i) A multimeter (ii) Reads if there is short circuit in the electric circuit (1b) (i) A simple microscope uses one lens while a compound microscope uses two lens (ii) A compound microscope produces a higher magnification than that of simple microscope (1c) Using M= ZIt I = M/Zt I = 450/3.30*10- *25*60 I = 909A ============================== (3a) Range (R) is defined as the horizontal distance from the point of projection to the point where the projectile hits the projection plane again (3b) Time of flight: T= 2usin/g sin = Tg/2u = 1.5*10/2*12 sin = 15/24 = 0.625 = sin-(0.625) = 38.7 ============================== (4a) (i) Flying bullet (ii) A moving car (4b) mgh = mc = gh/c = 10*108/4200 = 0.257C or 0.257K ============================== (5a) Vaporization is the conversion of a subs...