Previous Year Paper year:2019 : ICSE-X-Physics

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ICSE-X-Physics

Previous Year Paper year:2019

with Solutions - page 6

#7-c-i
Name the type of oscillation, C will execute.

#7-c-ii
Name the type of oscillation, D will execute.

#7-c-iii
If the length of D is made equal to C, then what difference will you notice in the oscillations ofD?

#7-c-iv
WHat is the name of the phenomenon when the length of D is made equal to C?

[4]

#8

#8-a

#8-a-i
Write one advantage of connecting electrical appliances in parallel combination.
Ans : All appliances will continue to work even if one of the appliance does not work.

#8-a-ii
What characteristics should a fuse wire have?
Ans : High resistivity and low melting point.

#8-a-iii
Which wire in a power circuit is connected to the metallic body of the appliance?

[3]

Ans : The ground wire.

(b) (i) The diagram is as shown :

(ii) A is connected to the live wire and B to neutral wire.

(c) (i) R_S = 5 + 0.5 = 5.5 Ω

(ii) I=``\frac { V }{ R }``=``\frac { 3.3 }{ 5.5 }``= 0.6A

5×5

(iii) R_P = ``\frac{5 \times 5}{5+5}`` == 2.5 Ω, thus total resistance is R_T = 2.5 +0.5 = 3.0

I= ``\frac{\mathrm{V}}{\mathrm{R}_{\mathrm{T}}}`` = ``\frac { 3.3 }{ 3.0 }``

= 1.1 A

#8-b
The diagram below shows a dual control switch circuit connected to a bulb.

#8-b-i
Copy the diagram and complete it so that the bulb is switched ON.

#8-b-ii
Out of A & B which one is the live wire and which one is the neutral wire?

#8-c
The diagram shows a circuit with the key k open.

Calculate:

#8-c-i
the resistance of the circuit when the key k is crpen.

#8-c-ii
the current drawn from the cell when the key k is open,