10 common question

Question 1

Nuclear sizes are expressed in a unit named_____.

  Fermi

  Angstrom

  Newton

  Tesla

It's 'Fermi '
Fermiis a unit of length equal to 10⁻¹⁵ meter used in nuclear physics. It is similar to the diameter of a proton.

Question 2

Sound waves in air are_______.

  transverse

  longitudinal

  electromagnetic

  polarized

It's 'longitudinal '
Sound waves in air are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

Question 3

The image formed by a plane mirror is always______.

  real and erect

  virtual and erect

  real and inverted

  virtual and inverted

It's 'virtual and erect '
The image formed by a plane mirror is always virtual upright and of the sameshape and size as the object it is reflecting.

Question 4

Lux is the SI unit of _____.

  intensity of illumination

  luminous efficiency

  luminous flux

  luminous intensity

It's 'intensity of illumination '
The SI unit of intensity of illumination is the lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining on an area of 1.0 m².

Question 5

Sound of frequency below 20 Hz is called ______.

  audio sounds

  infrasonic

  ultrasonic

  supersonics

It's 'infrasonic '
Infrasound, sometimes referred to as low-frequency sound is sound that islower in frequency than 20 Hz (hertz) or cycles per second, the "normal" limit of human hearing.

Question 6

A transformer works with ________.

  Alternating current

  Direct current

  Both AC and DC

  Any signal

It's 'Alternating current '
Atransformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Commonly,transformers are used to increase or decrease the voltages of alternatingcurrent in electric power applications.

Question 7

Of the following natural phenomena, tell which one known in Sanskrit as deer’s thirst'?

  Rainbow

  Earthshine

  Halo

  Mirage

It's 'Mirage '
A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky.

Question 8

In which of the following industries is mica as a raw material?

  Cement

  Glass and Pottery

  Iron and Steel

  Electrical

It's 'Electrical '
Mica is a raw material of electrical industries.

Question 9

Which of the following is wrongly matched?

  Barometer -Pressure

  Lactometer- milk

  Coluomb’s law- charges

  Nuclear reactor-electron

It's 'Nuclear reactor-electron '
A nuclear reactor, formerly known as atomic pile is a device used to initiate and control a sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in propulsion of ships.

Question 10

Which of the following kind of energy is stored in a dry cell?

  Mechanical

  Electrical

  Chemical

  Heat

It's 'Chemical '
Dry cells are a type of chemical cells. Dry cells are commonly used today in the form of batteries