Play Online Physics Quiz Competition No 4

Q1 Free surface of a liquid behaves like a sheet and tends to contract to the smallest possible area due to the
Q2 Pencil “lead” is made up of
Q3 The Halley’s Comet will be visible again in the year
Q4 Convex lenses are used for the correction of
Q5 Red light is used in traffic signals because
Q6 Summer solstice occurs in the Northern hemisphere
Q7 Which of the following reason is correct about an optical illusion in which atmospheric refraction by a layer of hot air distorts or inverts reflections of distant objects?
Q8 The amount of time light takes to reach the earth’s surface from the sun is:
Q9 Why the star appears to move from east to west?
Q10 Food cans are coated with tin and not zinc because -