SAMPLE PAPER - 1
Section A
- When light travels from glass to air,
(a) no change occurs
(b) it moves away from the normal
(c) it moves towards the normal
(d) none of these- Refractive index depends on the following factors except
(a) nature of material of medium
(b) density of medium
(c) angle of incidence
(d) colour or wavelength of light- Mirages are observed in deserts due to the phenomenon of
(a) interference of light
(b) scattering of light
(c) dispersion of light
(d) total internal reflection- Ohm's law is valid for
(a) all conductors
(b) only metallic conductors
(c) all elements
(d) none of these- The SI unit of resistivity is
(a) ohm
(b) ohm metre square
(c) ohm metre
(d) ohm/metre- In this circuit the volt meter will read
(a) 24 V
(b) 25 V
(c) 30 V
(d)35 V- In the following circuit the ammeter will read
(a)5A
(b)0.5A
(c)1 A
(d)0.1A- When an object is placed at 2F in front of a cocave mirror, then its image is formed at
(a) F
(b) 2F
(c) infinity
(d) between F and 2 F- A convex lens is
(a) thicker at the middle than at the edges
(b) thicker at the edges than at the middle
(c)plane everywhere
(d) uniform for one half and non uniform thickness at the other half- A substance is behaving as a convex lens in air and concave lens in water, then its refractive index is :
(a) smaller than air
(b) greater than both water and air
(c)greater than air but less than water
(d) almost equal to that of water- In an acid soulution, the pH is
(a) greater than p(OH)
(b) leass than p(OH)
(c)equal to p(OH)
(d) none of these- Which of the following solutions of equal cncentration will have lowest pH?
(a) HCl
(b)H2SO4
(c) NaOH
(d)HNO3- Methyl Orange is suitable for titrating
(a)A weak acid with a weak base
(b)A strong base with a weak base
(c)A weak base with a strong acid
(d) none of these- pH of lime water is
(a)7
(b)more than 7
(c)less than 7
(d)zero
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