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A simple pendulum is made of body which is a
hollow sphere containing mercury suspended by
means of a wire. If a little mercury is drained off,
the period of the pendulum will–
(a) remain unchanged (b) increase
(c) decrease (d) become erratic

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SSC Other Question

The tension in the string of a simple pendulum is–
(a) constant
(b) maximum in the extreme position
(c) zero in the mean position
(d) none of the above
A neutral atom (atomic no. > 1) consists of -
(a) Only protons
(b) neutrons + protons
(c) Neutrons + electrons
(d) Neutron + proton + electron