Important Questions of Understanding Natural Phenomenon Science | Zigya

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11.

In ficus, the pollination is affected by

  • insects

  • air

  • water

  • birds


12.

100 Newton force is applied perpendicularly on the surface of 10 cm, the pressure on that surface will be

  • 1x105 Newton/m2

  • 10x105 Newton/m2

  • 1x10-5 Newton/m2

  • 106 Newton/m2


13.

If the kinetic energy of a body is increased by 0.1%, then an increase in its momentum will be

  • 0.05%

  • 0.1 %

  • 1.0%

  • 10%


14.

The speed of sound in air at NTP is 332 m/s. If air pressure becomes four times, then the speed of sound will be

  • 166 m/s

  • 332 m/s

  • 664 m/s

  • 1328 m/s


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15.

Each of the five capacitors shown in the given bridge circuit is 10 µF connected with a 100V DC source. The equivalent capacitance between the points A and B is

  • 40 µF

  • 30 µF

  • 20 µF

  • 10 µF


16.

Name the process used for purification of white bauxite ore containing no iron oxide as an impurity.

  • Bayer's process

  • Hall's process

  • Serpek's process

  • Hoopes electrolytic process


17.

A force F = (5i + 3j) Newton displaces a body by (2i- j). The work done is

  • zero

  • 7 J

  • 12 J

  • 13 J


18.

The temperature at which ferromagnetism vanishes and the substance becomes paramagnetic is called

  • Inversion temperature

  • Boyle temperature

  • Curie temperature

  • Kelvin temperature


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