Daily Updates Mock Test 62

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Daily Updates Mock Test 62

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Questions and Answers
  • 1. 
    The highest temperature attained by a super conductor is- 
    • A. 

      24 K

    • B. 

      138 K

    • C. 

      150 K

    • D. 

      300 K

  • 2. 
    The ozone layer absorbs
    • A. 

      Infrared radiation

    • B. 

      Microwaves

    • C. 

      Radio wave

    • D. 

      Ultraviolet rays

  • 3. 
    The resistance of a semiconductor on heating 
    • A. 

      Remains

    • B. 

      Decreases

    • C. 

      Increases

    • D. 

      None of the above

  • 4. 
    The earth’s magnetic field is due to 
    • A. 

      Currents circulating inside the core

    • B. 

      Presence of a huge magnet at is centre

    • C. 

      Moving charges in space outside

    • D. 

      None of the above

  • 5. 
    Which of the following option represents the consumption of power in ascending order-
    • A. 

      Television, fan, electronic press, electronic kettle

    • B. 

      Television, fan, electronic kettle, electronic press

    • C. 

      Fan, television, electronic press, electronic kettle

    • D. 

      Electronic press, electronic kettle, fan, television

  • 6. 
    How does the white light produce in the tube? 
    • A. 

      To Heat up the copper wire

    • B. 

      To Heat up the filament

    • C. 

      To accelerate the atoms

    • D. 

      To oscillate molecule

  • 7. 
    Full form of C.F.I. is- 
    • A. 

      Compact Fluorescent Lamp

    • B. 

      Centrally Fixed Lamp

    • C. 

      Chemical Fluorescent Lamp

    • D. 

      Condensed Fluorescent Lamp

  • 8. 
    A device which converts chemical energy into electrical energy is called-
    • A. 

      Battery

    • B. 

      Motor

    • C. 

      Generator

    • D. 

      Moving coil meter

  • 9. 
    The filament of bulb is of
    • A. 

      Mercury

    • B. 

      Copper

    • C. 

      Tungsten

    • D. 

      None of these

  • 10. 
    The tolerable limit of noise for human being is around- 
    • A. 

      45 decibel

    • B. 

      85 decibel

    • C. 

      125 decibel

    • D. 

      155 decibel

  • 11. 
     What is the decibel level of sound produced by two persons in conversation? 
    • A. 

      About 5 Decibel

    • B. 

      About 10 Decibel

    • C. 

      About 30 Decibel

    • D. 

      About 100 Decibel

  • 12. 
    Maximum temperature inside pressure cooker depends on: 
    • A. 

      Area of hole on the top and weight kept on it

    • B. 

      Area of hole on the top and food being cooked

    • C. 

      Weight kept on hole at top and food being cooked

    • D. 

      Area of hole on the top only

  • 13. 
     A fan produces feeling of comfort during hot weather, because- 
    • A. 

      Fan supplies cold air

    • B. 

      Our perspiration evaporates rapidly

    • C. 

      Our body radiates more heat

    • D. 

      Conductivity of air increase

  • 14. 
    Xeric condition refers to- 
    • A. 

      Low temperature

    • B. 

      Low humidity

    • C. 

      High evaporation

    • D. 

      Extreme temperature

  • 15. 
    What is absolute zero temperature? 
    • A. 

      The starting point of any temperature scale

    • B. 

      Theoretically the lowest possible temperature

    • C. 

      The temperature at which the vapour of any liquid substance is condensed

    • D. 

      The temperature at which all material are in vapour form

  • 16. 
    Which zone of a candle flame is the hottest? 
    • A. 

      Dark innermost zone

    • B. 

      Outermost zone

    • C. 

      Middle luminous zone

    • D. 

      Central zone

  • 17. 
    The image of the object that we see, forms on the retina of our eyes is—
    • A. 

      always erect

    • B. 

      Always inverted

    • C. 

      Erect or inverted depends upon the intensity of light

    • D. 

      Erect or inverted depends upon the age of the person

  • 18. 
    Evening Sun is not as hot as the midday sun. What is the reason? 
    • A. 

      In the evening, radiation travel slowly

    • B. 

      In the evening, the temperature of the sun decreases

    • C. 

      Ozone in atmosphere absorbs more light in the evening

    • D. 

      In the evening, radiations travel larger distance through atmosphere

  • 19. 
    A body is thrown vertically upwards and then falls back on the ground. When its potential energy is maximum?
    • A. 

      On the ground

    • B. 

      At the maximum height

    • C. 

      During the return journey

    • D. 

      Both on the ground and at the maximum height

  • 20. 
    The magnet is strongest near the-
    • A. 

      On equator point from the poles of the magnet

    • B. 

      Ends of the magnet

    • C. 

      Centre of magnet

    • D. 

      None of the above

  • 21. 
    A body travelling with a speed of more than the velocity of sound in air is said to travel with— 
    • A. 

      Supersonic speed

    • B. 

      Hypersonic speed

    • C. 

      Ultrasonic speed

    • D. 

      Infrasonic speed

  • 22. 
    Which of the special technique is used in ships to calculate the depth of ocean beds?
    • A. 

      LASER

    • B. 

      SONAR

    • C. 

      Sonic boom

    • D. 

      Reverberation

  • 23. 
    What is the SI unit of electrical conductance?
    • A. 

      Volt

    • B. 

      Watt

    • C. 

      Siemens

    • D. 

      Ampere

  • 24. 
    Which of the following is a conductor of electricity?
    • A. 

      Silver

    • B. 

      Copper

    • C. 

      Aluminium

    • D. 

      All of the above

  • 25. 
     Why is tungsten used exclusively for the filament of an incandescent lamp?
    • A. 

      Tungsten can be drawn into thin wires which in turn offer high resistance

    • B. 

      Tungsten has a fairly good resistivity

    • C. 

      The melting point of tungsten is very high

    • D. 

      All of these

  • 26. 
    Why ammeter is likely to burn out if you connect it in parallel?
    • A. 

      It has high voltage

    • B. 

      It has high resistance

    • C. 

      It has low resistance

    • D. 

      It has low voltage

  • 27. 
    What will happen to current passing through a resistor if the potential difference across its ends is doubled and the resistance is halved?
    • A. 

      Becomes four times

    • B. 

      Becomes halved

    • C. 

      Remain unchanged

    • D. 

      Becomes one fourth

  • 28. 
    Which of the following has the highest refractive index?
    • A. 

      Glass

    • B. 

      Water

    • C. 

      Pearl

    • D. 

      Diamond

  • 29. 
    For a plane mirror, magnification (m)=________
    • A. 

      0

    • B. 

      1

    • C. 

      ± 1

    • D. 

      ≤ 0

  • 30. 
    We can see objects because of which phenomena?
    • A. 

      reflection

    • B. 

      refraction

    • C. 

      Transmission

    • D. 

      Diffraction

  • 31. 
    Which has no importance for fuse wire –
    • A. 

      Specific resistance of wire

    • B. 

      Diameter of wire

    • C. 

      Length of wire

    • D. 

      Current passing through the wire

  • 32. 
    The specific resistance of a wire varies with its –
    • A. 

      Length

    • B. 

      Cross-section

    • C. 

      Mass

    • D. 

      Material

  • 33. 
    The unit of specific resistance is –
    • A. 

      Ohm

    • B. 

      Ohm–1

    • C. 

      Ohm-metre

    • D. 

      Ohm per metre

  • 34. 
    How many electrons constitute a current of one microampere –
    • A. 

      6.25 × 10^6

    • B. 

      6.25 × 10^12

    • C. 

      6.25 × 10^9

    • D. 

      6.25 × 10^15

  • 35. 
    Good conductors have many loosely bound –
    • A. 

      Atoms

    • B. 

      Protons

    • C. 

      Molecules

    • D. 

      Electrons

  • 36. 
    The variable resistance is called –
    • A. 

      Resistor

    • B. 

      Rheostat

    • C. 

      open switch

    • D. 

      None of these

  • 37. 
     If the length of a wire is doubled and its cross-section is also doubled, then the resistance will –
    • A. 

      Increase eight times

    • B. 

      Decrease four times

    • C. 

      Become four times

    • D. 

      Remain unchanged

  • 38. 
    Instruments can be shielded from outside magnetic effects by surrounding them with
    • A. 

      Iron shield

    • B. 

      Rubber shield

    • C. 

      Brass shield

    • D. 

      Glass shield

  • 39. 
    The following is a pseudo-force:
    • A. 

      Centrepetal force

    • B. 

      Centrifugal reaction force

    • C. 

      Centrifugal force

    • D. 

      Strong nuclear force

  • 40. 
    The hydraulic brake used in automobiles is a direct application of
    • A. 

      Archimedes’ principle

    • B. 

      Torricellean law

    • C. 

      Bernoulli’s Theorem

    • D. 

      Pascal’s law

  • 41. 
    Which instrument is used to measure sound under water ?
    • A. 

      Hygrometer

    • B. 

      Hygroscope

    • C. 

      Hypsometer

    • D. 

      Hydrophone

  • 42. 
    Which instrument is used to measure pressure of gases ?
    • A. 

      Manometer

    • B. 

      Machmeter

    • C. 

      Magnetometer

    • D. 

      Micrometer

  • 43. 
    Which instrument is used to measure heat radiation ?
    • A. 

      Radar

    • B. 

      Salinometer

    • C. 

      Refractometer

    • D. 

      Radio micrometer

  • 44. 
    Which instrument is used to measure strength of direct current ?
    • A. 

      Stroboscope

    • B. 

      Streoscope

    • C. 

      Tangent Galvanometer

    • D. 

      Tachometer

  • 45. 
     K. Macmillan invented
    • A. 

      Bicycle

    • B. 

      Barometer

    • C. 

      Calculating Machine

    • D. 

      Centigrade Scale

  • 46. 
    Thomas Alva Edison invented
    • A. 

      Cinema

    • B. 

      Cine Camera

    • C. 

      Computer

    • D. 

      Cinematograph

  • 47. 
    Alfred Nobel invented
    • A. 

      X ray

    • B. 

      Diesel Engine

    • C. 

      Dynamite

    • D. 

      Dynamo

  • 48. 
    David Hughes invented
    • A. 

      Machine Gun

    • B. 

      Microphone

    • C. 

      Microscope

    • D. 

      Motorcycle

  • 49. 
    Marie and Pierre Curie invented
    • A. 

      Radio

    • B. 

      Radium

    • C. 

      Radar

    • D. 

      Refrigerator

  • 50. 
    Alexander Graham Bell invented
    • A. 

      Telephone

    • B. 

      Telescope

    • C. 

      Television

    • D. 

      Tank