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Science

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements about force is false?

  1. At least two objects must interact for a force to take place.
  2. Forces applied on an object in the same direction add to one another.
  3. Force has only magnitude.
  4. If two forces act in opposite directions on an object, the net force acting on it, is the difference between the two forces.
  5. More than one force may act on an object.
Question 2 Multiple Choice (Single Answer)

Which part of the ear helps us to hear sounds of audible frequency?

  1. Pinna
  2. Semi-circular canals
  3. Malleus
  4. Eustachian tube
  5. Tympanum
Question 3 Multiple Choice (Single Answer)

Sound with the frequency range of 20 Hertz to 20,000 Hertz is called ________.

  1. infrasonic sound
  2. audible sound
  3. ultrasonic sound
  4. tympanum
  5. noise
Question 4 Multiple Choice (Single Answer)

Which of the following is expressed as magnitude of force?

  1. Friction
  2. Direction
  3. Wavelength
  4. Strength
  5. Period for which the force acts
Question 5 Multiple Choice (Single Answer)

A boy was trying to read the thermometer by holding its bulb. His father told him that this method is incorrect and advised him not to hold the bulb of the thermometer while reading it. Why is it so?

  1. The bulb will break off easily.
  2. Mercury will come down to the bulb.
  3. It will give a wrong reading.
  4. The boy’s body temperature will increase by holding the bulb.
  5. The bulb may get dislogged.
Question 6 Multiple Choice (Single Answer)

Which of the following is an example of muscular force?

  1. Magnet attracting an iron piece.
  2. Blacksmith hammering a hot piece of iron.
  3. A rolling ball coming to rest.
  4. An apple falling from a tree.
  5. An aircraft taking off.
Question 7 Multiple Choice (Single Answer)

Air is a poor conductor of electricity. Which of the following is an exception for this rule?

  1. Thunder
  2. Winds
  3. Hurricanes
  4. Lightning
  5. Twilight
Question 8 Multiple Choice (Single Answer)

Which of the following is not a poor conductor of electricity?

  1. Plastic
  2. Rubber
  3. Copper wire
  4. Wood
  5. Glass
Question 9 Multiple Choice (Single Answer)

The circuit of a tester may be complete, yet the bulb may not glow as the current through it may be too weak. How can such weak currents be detected?

  1. Using LED in place of the bigger bulb.
  2. By breaking the circuit.
  3. By changing the circuit.
  4. By using a different metallic wire.
  5. By changing the solution in which the wires are immersed.
Question 10 Multiple Choice (Single Answer)

In which of the following cases is the maximum friction observed?

  1. A boy doing roller skating.
  2. A ball hits another ball rolling across the billiard's table.
  3. A boy dragging a mat on which another boy is seated.
  4. Holding a greasy tumbler.
  5. Playing carrom on a board that was sprinkled with powder.
Question 11 Multiple Choice (Single Answer)

Friction is caused by the _______ on the two surfaces in contact.

  1. irregularities
  2. smoothness
  3. inclination
  4. width
  5. height
Question 12 Multiple Choice (Single Answer)

What is the range of Fahrenheit scale?

  1. 98 - 120 degrees
  2. 90 - 100 degrees
  3. 92 - 104 degrees
  4. 93 - 104 degrees
  5. 94 - 108 degrees
Question 13 Multiple Choice (Single Answer)

Loudness of sound is measured in a unit called _____________.

  1. Joule
  2. Ohm
  3. Pascal
  4. Decibel
  5. Farad
Question 14 Multiple Choice (Single Answer)

A nurse is about to take the temperature of a patient. One notices that the nurse jerks the clinical thermometer well, before placing it under the tongue of the patient. Why does she jerk it?

  1. The jerking makes the mercury level higher.
  2. To frighten the patient.
  3. To show her experience.
  4. To bring down the level of mercury below 35 degrees centigrade.
  5. To warm up the thermometer.
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