43
If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object
- A. Is quadrupled
- B. Is halved
- C. Remains the same
- D. Is double
44
I.Chemical II.Sound III.Electricity
Which of the above forms of energy can directly be converted to light energy?
- A. I and II only
- B. II and III only
- C. I, II and III
- D. I and III only
45
A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is
- A. \(\frac{g}{16}\)
- B. \(\frac{g}{4}\)
- C. \(\frac{4}{g}\)
- D. \(\frac{16}{g}\)
46
What happens to a water pool on a day when the humidity of the air is very low?
- A. Temperature decreases
- B. Slow evaporation
- C. Temperature increases
- D. Rapid evaporation
47
A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will
- A. Be a straight line
- B. Curve inwards
- C. Be a parabola
- D. Curve outwards
48
Myopic defects in the human eye can be corrected through the use of a
- A. Concave Mirror
- B. Concave lens
- C. Prism
- D. Convex lens