A circular disc is to be made by using iron and aluminium, so that it acquires maximum moment of inertia about its geometrical axis. It is possible with

Question:

2.A circular disc is to be made by using iron and aluminium, so that it acquires maximum moment of inertia about its geometrical axis. It is possible with

Options :

a) Iron and aluminium layers in alternate order
(b) Aluminium at interior and iron surrounding it
(c) Iron at interior and aluminium surrounding it
(d) Either (a) or (c)

Answer :

(b) Aluminium at interior and iron surrounding it

Answer Steps :

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

If a body is executing simple harmonic motion then

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