IMPORTANT QUESTIONS

1. Q231 It takes 6 minutes for the signal sent by an artificial satellite orbiting around the earth to reach the ground station. Calculate the distance of the artificial satellite from the ground station. The signal travels with the speed of light. (3 x 10⁸m/s).

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2. Q232 Name one important public building of Indus Valley Civilisation and its importance.

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3. Q233 Give any two characteristic features of the citadel.

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4. Q234 A force of 150 N is applied to a surface of area 5m². Find the pressure applied on that area

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5. Q235 ____of these books belong to you?

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6. Q236 It is easier to lift a heavy stone under water than in air. Explain?

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7. Q237 From a rifle of mass 5 kg, a bullet of mass 50 gram is fired with an initial velocity of 30 metre per second. The initial velocity of recoil of the rifle is:

   • a) 0.3m/s
   • b) 0.6m/s
   • c) 0.9m/s
   • d) 1.0m/s

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8. Q238 State the relation between potential difference, work done and charge moved.

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9. Q239 Define an ecosystem giving two examples.

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10. Q240 What is the main reason for increase in temperature in a green house?

    • (a)Sunlight is completely absorbed by plants in the green house
    • (b)Radiation fails to escape from the glass house completely
    • (c)Plants do not utilize sunlight in a glass house
    • (d)Plants produce heat inside the green house.

    Easy View solution