Tag: physics

Questions Related to physics

Which among the following is the greatest achievement of Chandrayaan?

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. the discovery of the widespread presence of water molecules in the lunar soil

  2. the discovery of the widespread presence of nitrogen molecules in the lunar soil

  3. the discovery of the widespread presence of $CO _2$ molecules in the lunar soil

  4. none of the above

Show answer
Correct Option: A
Explanation:

Chandrayaan-1 was India's first lunar probe. It was launched by Indian Space Research Organisation (ISRO) in Ocyuber 2008 and operated until August 2009. The vehicle was successfully inserted into lunar orbit on 8 November, 2008. The greatest achievement of Chandrayaan is the discovery of the widespread presence of water molecules in the lunar soil.

______________________is a CMOS camera, performed mineralogical mapping in the 400900 nm band with a spectral resolution of 15 nm and a spatial resolution of 80 m.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. HEX

  2. Hyper Spectral Imager

  3. Moon Impact Probe

  4. none of the above

Show answer
Correct Option: B
Explanation:

The scientific payload in Chandrayaan contained 5 Indian Instruments and 6 instruments from other countries.

Hyper Spectral Imager (HY SI), one of the Indian instruments, is a CMOS camera that performed mineralogical mapping in the 400-900 nm band with a spectral resolution of 15 nm and a spatial resolution of 80 m.

Which of the following Indian instruments were used in chandrayaan?

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. TMC

  2. LLRI

  3. HEX

  4. all of the above

Show answer
Correct Option: D
Explanation:

The scientific payload in Chandrayaan contained 5 Indian instruments and 6 instruments from other countries.

The Indian instruments used in Chandrayaan were Terrain Mapping Camera (TMC), Hyper Spectral Imager (Hy SI), Lunar Laser Ranging Instrument (LLRI), High Energy aj/gamma X-ray Spectrometer (HEX) and Moon Impact Probe (MIP).

The specifications of chandrayaan include which of the following?

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. 1380 Kg in mass.

  2. Cuboidal in shape

  3. Fuel and oxidiser were stored in two tanks of 390 litres each.

  4. all of the above

Show answer
Correct Option: D
Explanation:

The mass of Chandrayaan was 1380 kg at launch, 675 kg at lunar orbit and 523 kg after releasing the impactor. It was cuboidal in shape. The spacecraft used a bipropellant  integrating propulsion system to reach lunar orbit as well as its maintenance while operating the moon. The power plant consisted of one 440 N engine and eight 220 thrusters. Fuel and oxidiser were stored in two tanks of 390 litres each.

The Chandrayaan used a _______________ integrated propulsion system to reach lunar orbit as well as orbit and altitude maintenance while orbiting the Moon.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. tripropellent

  2. bipropellant

  3. two star sensors

  4. none of the above

Show answer
Correct Option: B
Explanation:

 The Chandrayaan used a bipropellant  integrating propulsion system to reach lunar orbit as well as orbit and altitude maintenance while operating the Moon. The power plant consisted of one 440 N engine and eight 220 thrusters. Fuel and oxidiser were stored in two tanks of 390 litres each.

The Chandrayaan was mainly powered by its solar array, which included one solar panel covering a total area of 2.15 x 1.8 m generating 750 W of peak power, which was stored in a_____________ for use during eclipses.

physics search of life outside earth space research and satellites artificial satellites space missions and artificial satellites

  1. cadmium zinc battery

  2. lead ion battery

  3. 36 Ah lithium-ion battery

  4. none of the above

Show answer
Correct Option: C
Explanation:

The Chandrayaan was mainly powered by its solar array, which included one solar panel covering a total area of 2.15 x 1.8 m generating 750 W of peak power, which was stored in a 36 Ah lithium-ion battery for use during eclipses.

Which of the following is used for the fabrication of Integrated circuits?

physics semiconductors integrated circuits & microprocessor integrated chips semiconductor devices

  1. Semiconductors

  2. Metals

  3. Insulators

  4. Alloys.

Show answer
Correct Option: A
Explanation:

An integrated circuit is an electronic circuit formed on a small piece of semiconducting material, which performs the same function as a larger circuit made from discrete components. A semiconductor such as silicon can be controlled to conduct much or little. This allows making transistors that control each other.

Integrated circuits are preferred over conventional circuits because:

physics semiconductors integrated circuits & microprocessor integrated chips semiconductor devices

  1. They are very compact in size.

  2. They are cheap.

  3. They are fast and more efficient.

  4. All of the above

Show answer
Correct Option: D
Explanation:

Integrated circuits are electronic circuits formed on a small piece of semiconducting material, which perform the same function as a larger circuit made from discrete components. They are compact, and cheap and fast and more efficient than conventional circuits, and hence they are preferred over them.

Which of the following is a characteristic of analog ICs?

physics semiconductors integrated circuits & microprocessor integrated chips semiconductor devices

  1. They can be used for analog input and output signals only.

  2. They cannot be used for analog input and output signals.

  3. Input signal is analog but output signal is digital.

  4. Output signal is analog but input signal is digital.

Show answer
Correct Option: A
Explanation:

Analog circuits are circuits dealing with signals free to vary from zero to full power supply voltage. This stands in contrast to digital circuits, which almost exclusively employ 'all or nothing' signals. Both the input and output signals are analog here.

Which of the following is not a type of an IC?

physics semiconductors integrated circuits & microprocessor integrated chips semiconductor devices

  1. Analog IC

  2. Digital IC

  3. Mixed IC

  4. Compound IC

Show answer
Correct Option: D
Explanation:

Analog circuits are circuits dealing with signals free to vary from zero to full power supply voltage. This stands in contrast to digital circuits, which almost exclusively employ “all or nothing” signals.
A mixed integrated circuit is any integrated circuit that has both analog circuits and digital circuits on a single semiconductor device.