Science quiz

 

Mapofscience

Q- The correct relation between the radius of curvature R and focal length f of a spherical mirror is -

1) R = f
2) R = 2f
3) R = 3f
4) R = 4f


Q. A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of -
1) reflection of light
2) scattering of light
3) refraction of light
4) polarization of light


Q. Name the scientist who first used a glass prism to obtain the spectrum of sunlight -
1) C. V. Raman
2) Lord Rayleigh
3) Isaac Newton
4) S. Chandrashekhar


Q. This cost of energy to operate an industrial refrigerator that consumes 5 kW power working 10 hours per day for 30 days will be -
(Given that the charge per kW.h of energy = Rs. 4)
1) Rs. 600
2) Rs. 6,000
3) Rs. 1,200
4) Rs. 1,500


Q. Which one of the following statements regarding magnetic field is not correct?
1) Magnetic field is a quantity that has direction and magnitude
2) Magnetic field lines are closed curves
3) Magnetic field lines are open curves
4) No two magnetic field lines are found to cross each other


Q. Which one of the following types of radiations has the smallest wavelength?
1) Microwaves
2) Infra-red
3) Visible light
4) X-rays


Q. The instrument used for detecting the presence of electric current in a circuit is -
1) Refractometer
2) Galvanometer
3) Viscometer
4) Diffractometer


Q. The Sun appears reddish during sunrise and sunset. The phenomenon in optics which is responsible for this appearance of the Sun is -
1) Reflection
2) Total internal reflection
3) Scattering
4) Interference


. A lens has a power of + 2.0 Diopter. Which one of the following statements about the lens is true?

1) The lens is concave and has a focal length of 0.5 meter
2) The lens is convex and has a focal length of 0.5 meter
3) The lens is convex and has a focal length of 0.5 meter
4) The lens is concave and has a focal length of 2.0 meter


Q. Which one of the following was the first mineral acid discovered?
1) Sulphuric acid
2) Hydrochloric acid
3) Nitric acid
4) Phosphoric acid

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