K.C.S.E Physics Q & A - MODEL 2000PP2QN04

K.C.S.E Physics Q & A - MODEL 2000PP2QN04

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(a) (i) State one property of soft iron that makes it suitable for use as a transformer core.
(ii) Fig 6 represents a step- down transformer with 500 turns in the primary and 50 turns in the secondary. The turns are wound uniformly on the core. The lengths of PQ and QR are indicated. Determine the p.d across PQ.
(b) Fig 7 represents a block of uniform cross sectional area of 6.0cm² floating on two liquids A and B. The lengths of the block in each liquid are shown.

Given that the density of liquid A is 800kgm^-3 and that of liquid B is 1000kgm³ determine the:
(i) b weight of liquid A displaced
(ii) Weight of liquid B displaced
(iii) Density of the block

answers