An iron needle sinks in water whereas a ship made of iron floats on it because
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Of the two bulbs in a house, one glows brighter than the other. Which of the following statements is correct?
Consider the following statements in respect of a jet engine and a rocket:
1. A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space.
2. A rocket carries its own supply of oxygen in the gas form as a fuel.
Q. Which of the above statement(s) is/are correct?
Electronic motors operating at low voltages tend to burn out because
If the doors of a refrigerator are left open for a few hours, the room temperature will
If a rock is brought from the surface of the moon to the earth, then
Match List-I with List-II and select the correct answer using the codes given below the lists:
Match List-I with List-II and select the correct answer with the help of codes given below:
Which one of the following statements is not true about cosmic rays?
Consider the following statements and select the correct code:
Assertion (A): A piece of ice added to the drink cools it.
Reason (R): Ice takes latent heat from the drink for melting resulting in the cooling of the drink.
Match List-I with List-II and select the correct answer using the codes given below the lists:
The atmosphere exerts enormous pressure on us. But, we don’t feel it because
Which one of the following statements is not true for a person suffering from hypermetropia?
Consider the following statements and select the correct answer using the codes given below:
Assertion (A): If ice collects on the freezer, the cooling in the refrigerator is affected adversely.
Reason (R): Ice is a poor conductor.
133 videos|399 docs|221 tests
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133 videos|399 docs|221 tests
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