Welcome to your Science Quiz 20
1.
In which one among the following is the speed of sound maximum? [2006]
2.
Which of the following pairs is/are correctly matched? Inventor Invention: [2006]
- Christopher Cockerell: Hovercraft
- David Bushnell: Submarine
- J.C. Perrier: Steamship
Select the correct answer using the code given below:
3.
Consider the following statements: [2006]
- The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitude.
- Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading.
Which of the statements given above is/are correct?
4.
Which one of the following is printed on a commonly used fluorescent tubelight? [2006]
5.
What is the order of magnitude of electric resistance of the human body (dry)? [2005]
6.
Who among the following invented Lasers? [2005]
7.
Assertion (A): In our houses, the current in AC electricity line changes direction 60 times per second. [2004] Reason (R): The frequency of alternating voltage supplied is 60 hertz.
Choose the correct option.
8.
A spherical body moves with a uniform angular velocity around a circular path of radius r. Which one of the following statements is correct? [2004]
9.
Consider the following statements: [2003]
- Steam at 100° C and boiling water at 100° C contain same amount of heat.
- Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
- In an air-conditioner, heat is extracted from the room-air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?
10.
Consider the following statements: A 4-wheel vehicle moving a sharp circular path at high speed will: [2003]
- Overturn about its outer wheels
- Overturn about its inner wheels
- Skid outwards
- Skid inwards
Which of these statements are correct?
