Question : Which among the following is responsible for the rotation of the plane of oscillation of Foucault's pendulum?
Option 1: Centripetal force
Option 2: Viscous drag of air
Option 3: Centrifugal force
Option 4: Coriolis force
Correct Answer: Coriolis force
Solution : The correct answer is Coriolis force.
Coriolis force is responsible for the rotation of the plane of oscillation of Foucault’s pendulum. It is an experiment which was demonstrated in 1851 by a French scientist J. B. Leon Foucault. Coriolis force is due to the rotation of the Earth around its axis. The Earth rotates faster at the equator than it does at the poles.
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Question : The work done by the string of a simple pendulum during one complete oscillation is equal to
Option 1: The total energy of a pendulum
Option 2: Kinetic energy of the pendulum
Option 3: Potential energy of the pendulum
Option 4: Zero
Question : Which of the following helps keep the Earth's atmosphere in place?
Option 1: The gravitational force of the moon
Option 2: Rotation of the Earth on its axis
Option 3: The gravitational force of the Earth
Option 4: The gravitational force of the Sun
Question : Which of the following is not a primary force which influences ocean currents?
Option 1: Gravity
Option 2: Heating by the sun
Option 3: Magnetic fields of the earth
Question : The measure of the force that can cause an object to rotate about an axis is called:
Option 1: moment of inertia
Option 2: power
Option 3: torque
Option 4: centripetal force
Question : Which among the following is the habitat of 'Dogfish'?
Option 1: River
Option 2: Sea
Option 3: Lake
Option 4: Marsh
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