Question
The ________ regulates and controls the amount of light
entering the eye.Solution
• The pupil is the central opening in the iris that controls the amount of light entering the eye by contracting or dilating. • Iris controls the size of the pupil, but the pupil itself regulates light entry.
Which of the following is the ultimate source of energy?
In which direction does torque act?
What is the main principle behind the working of an electric motor? Â
What is the work done by a centripetal force on an object moving in a circular path at constant speed?
A toroid has a core (non-ferromagnetic) of inner radius 23 cm and outer radius 28 cm, around which 4000 turns of a wire are wound. If the current in th...
A thin conducting rod of length 3 m is aligned vertically (along the z-axis) and is moving in space with a velocity vector v = (i + 4j) m/s within a un...
Why does a fountain pen leak on an airplane flying at high altitude?
Which physical quantity has unit “Joule/second”? Â
The unit 'Weber' is associated with which of the following?
Which of the following is not a nuclear reaction?
