Question

Question 7
34
[3]
(a) The diagrams below show pins suspended from the same magnet to their
maximum limit in two different cases. State with a reason whether the set of
pins A or the set of pins B are made out of soft iron. Also define the magnetic
process which enables us to suspend the pins one below the other.
S.
N
s
N
Pins B
Pis A
[3]
(b) () Define a secondary cell.
(ii) Give one example of a secondary cell.
(iii) State one advantage of a secondary cell over a primary cell.
(c) (i) Define a neutral point.
[4]
(ii) In the diagram below AB is a magnet and CD is an iron bar.
Study the diagram and determine the polarities at the ends A,B and D.
B
A
С
D
Question 8
[3]
(a) The area of pistons in hydraulic machine are 6 cm² and 576 cmWhat force
on the smaller piston will support a load of 1152 N on the larger piston?
State the assumption made in the above calculation.
(b) (1) Define global warming,
[3]
(ii) State two ways by which global warming impacts on life on earth.​

Answer 1

Answer:

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