1. A
   $6.2 \times 10^{19}$ electrons
2. B
   $6.25 \times 10^{18}$ electrons
3. C
   $2.6 \times 10^{19}$ electrons
4. D
   $2.65 \times 10^{18}$ electrons

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1. A
   its length
2. B
   its area
3. C
   its thickness
4. D
   nature of the material

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1. A
   100 J
2. B
   3600 J
3. C
   6000 J
4. D
   600 J

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1. A
   0.2 amp
2. B
   0.61 amp
3. C
   0.69 amp
4. D
   0.66 amp

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1. A
   600 kW h
2. B
   420 kW h
3. C
   20 kW h
4. D
   2000 kW h

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1. A
   Potential difference
2. B
   Ammeter
3. C
   Resistance
4. D
   Current

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1. A
   5.8 amp
2. B
   4.9 amp
3. C
   3.9 amp
4. D
   4.8 amp

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1. A
   0.0025A
2. B
   0.005A
3. C
   0.01A
4. D
   0.02A

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1. A
   joule second
2. B
   volt ampere
3. C
   kilowatt hour
4. D
   watt second

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1. A
   6 A
2. B
   2 A
3. C
   1 A
4. D
   $\frac{1}{2}$ A

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1. A
   2.95 kW
2. B
   2.98 kW
3. C
   2.99 kW
4. D
   2.97 kW

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1. A
   $18 \times 10^5$ J
2. B
   $18 \times 10^6$ J
3. C
   $18 \times 10^7$ J
4. D
   $18 \times 10^9$ J

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1. A
   Watt
2. B
   Coulomb
3. C
   Ampere
4. D
   Volt

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1. A
   chemical effect of current
2. B
   lighting effect of current
3. C
   heating effect of current
4. D
   magnetic effect of current

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1. A
   $\frac{V^2}{R}$
2. B
   $VI$
3. C
   $IR^2$
4. D
   $I^2 R$

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1. A
   half
2. B
   double
3. C
   one - fourth
4. D
   four times

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1. A
   16
2. B
   32
3. C
   2
4. D
   0.5

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1. A
   $<1\,\Omega$
2. B
   $6\,\Omega$
3. C
   $18\,\Omega$
4. D
   $21\,\Omega$

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1. A
   absorption of light by the sea
2. B
   scattering of light
3. C
   reflection of sky in water
4. D
   the presence of algae and other plants found in water

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1. A
   Look towards the source
2. B
   Look in a direction equally inclined to the source of raindrops
3. C
   Look towards the raindrops with the light source behind him
4. D
   Look anywhere in the room

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1. A
   light is least scattered
2. B
   all the colours of the white light are scattered away
3. C
   red colour is scattered the most
4. D
   blue colour is scattered the most

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1. A
   dispersion of light by water droplets
2. B
   internal reflection of light by clouds
3. C
   refraction of light by different layers of varying refractive indexes
4. D
   scattering of light by dust particles

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1. A
   25 cm
2. B
   70 cm
3. C
   35 cm
4. D
   45 cm

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1. A
   the size of molecules is smaller than the wavelength of visible light
2. B
   there is no atmosphere at great heights
3. C
   the light gets scattered towards the earth
4. D
   the light gets scattered up at such heights

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1. A
   Hypermetropia
2. B
   Astigmatism
3. C
   Myopia
4. D
   Presbyopia

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