Curium is a radioactive element with the symbol 96 Cm named in honour of Madam Curie. The graph of
number of protons vs number of neutrons for some elements are shown below:
number of
protons
R Q P
94 S
number of
146 148 150 152 154 neutrons
(a) Which point on the graph indicates the element Cm?
(b) Which point on the graph indicates daughter nucleus after Cm undergoes radioactive decay of 1α
followed by 2β?
(c) State the mass number of the daughter nucleus.
(Attempt any four questions from this Section.)

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What is the correct energy transformation during burning of a candle?

Copper wire is wound around a steel bar FT. Current is allowed to pass through the coil for some time
and then the bar is removed.
(a) Draw only the magnetised bar FT and mark its poles.
(b) Trace two magnetic lines of force around FT clearly indicating the direction.
F T

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A body is acted upon by two equal and opposite forces, that are NOT along the same straight line. The
body will:

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Which among the following is a vector quantity?

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When a ray of light passes from one optical medium to another, which of the following physical quantities
does NOT change?

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Which one of the following combinations is the correct ascending order of electromagnetic waves in
terms of wavelength?