Practice Questions set 7 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) In the visible spectrum, the colour having the shortest wavelength is
(a)
(b)
(c)
(d)
Q-2) Reading glasses are made from which type of lenses?
(a)
(b)
(c)
(d)
Q-3) The velocity of sound is largest in
(a)
(b)
(c)
(d)
Q-4) The human eye forms the image of an object at its
(a)
(b)
(c)
(d)
Q-5) The graph given above indicates change in temperature (Dt) when heat (Q) was given to a substance. Which among the following parts of the graph correctly depict the latent heat of the substance?
(a)
(b)
(c)
(d)
Q-6) Consider the following statements :
- Convex lens is used ina terrestrial telescope.
- Convex lens of a small focal length is used as a magnifying glass.
- Convex lens forms an enlarged image of an object, when the object is placed beyond the focus of the lens.
Which of these statements are correct?
(a)
(b)
(c)
(d)
The enlarged image is formed by a convex lens when the object is placed between F1 and 2F1. Behind 2F1 the size of the image continuous decreases.
At 2F1, the size of the image formed by the convex lens is as same as the object.
Q-7) In order to avoid Sunlight, which of the following colour combination for an umbrella is most appropriate?
(a)
(b)
(c)
(d)
Q-8) Which one of the following types of waves are used in a night vision apparatus?
(a)
(b)
(c)
(d)
Q-9) Consider the following statements. - Fibre optics is based on the principle of total internal reflection.
- In an optical fibre communication system, power consumption is extremely low.
- Optical fibre communications are free from radio frequency interference.
- In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
Which of these statements are correct?
(a)
(b)
(c)
(d)
Q-10) Thermostat ...... is a mean of Keeping Stable.
(a)
(b)
(c)
(d)