91. The given circuit diagram is equivalent to Input CLK S Q RQ (1) T Flip-flop (2) clocked RS flip-flop (3) JK flip-flop (4) D flip-flop 2. Consider the Nuclear Magnetic Resonance (NMR). In a magnetic field, nucleus with spin and have how many equally spaced energy levels respectively? (1) 2,3 (2) 3,6 (3) 2,4 (4) 2,2 93. What is the magnetic vector potential due to an oscillating electric dipole in z-direction? (where symbols have the usual meanings) (1) A (r, 0, t) - 4x12 sin [(t-r/c)] 2 (2) A (r, 0, 1)= 2 4r sin [oo(t-r/c)] 2 (3) A (r, 0, t) - 4r sin [(t-r/c)] 2 (4) A (r, 0, 1)=-Hopow 4r sin [(t-r/c)] 2 94. Various aspects of development are (1) physical and motor development (2) emotional and social development (3) mental and cognitive development (4) All of the above 95. According to Piaget, the child understands conservation of length, area and volume concept at the following period: (1) concrete operational period (2) formal operational period (3) sensory motor period (4) pre-operational period