Q. Sun derives its energy from -
1) The fusion of hydrogen nuclei into helium nuclei
2) The fusion of helium nuclei into hydrogen nuclei
3) The fission of hydrogen nuclei
4) The fission of helium nuclei
Q. Which of the following statements is/ are true?
I. A concave mirror is used as a head-mirror by the ENT surgeons.
II. The concave metal dishes are used in dish antennas (or the dish aerials) of televisions.
1) Only I is correct
2) Only II is correct
3) I and II both are correct
4) Neither I nor II is correct
Q. Which of the following materials cannot be used to make a lens?
1) Water
2) Glass
3) Plastic
4) Clay
Q. Which one of the following is a non-metallic mineral?
1) Iron
2) Mica
3) Copper
4) Bauxite
Q. Which of the following are the characteristics of electromagnetic waves?
1. They are elastic waves.
2. They can also move in vacuum.
3. They have electric and magnetic components which are mutually perpendicular.
4. They move with a speed equal to 3 lakh meters per second.
Select the correct answer using the code given below -
1) 1, 2, 3 and 4
2) 1, 2 and 4 only
3) 2 and 3 only
4) 3 and 4 only
Q. Radiations coming form the Sun are mostly in the form of -
1) light only
2) light and long wavelength infrared
3) light and short wavelength infrared
4) both short and long wavelength infrared
Q. The temperature of a place on one sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be -
1) 318 K
2) 45 K
3) 62.8 K
4) 335.8 K
Q. Compared to audible sound waves, ultrasound waves have -
1) higher speed
2) higher frequency
3) longer wavelength
4) both higher speed and frequency
Q. Which one of the following statements regarding cathode rays is not correct?
1) Cathode ray particles are electrons
2) Cathode ray particles start from anode and move towards cathode
3) In the absence of electrical and magnetic fields, cathode rays travel in straight lines
4) Television picture tubes are cathode ray tubes
Q. Light rays move in straight lines. But through an optional fiber, they can move in any type of zigzag path because -
1) the holes through the fiber are extremely fine
2) light rays are absorbed at the entry end and relieved at the exit end of the fiber
3) scattering of light occurs inside the fiber
4) successive total internal reflections occur as a ray moves through the fiber
IntroductionAre you passionate about sports but don't see yourself as an athlete? Do you find the business side of sports fascinating? A career in sports management could be your winning ticket! This field combines business, sports, and management, offering dynamic roles that go far beyond the field →
Foundation Date: December 8, 1991 Headquarters: The Republic of Belarus Executive Secretaries: Sergei Lebedev Member Countries: 12 Commonwealth of Independent States (CIS) was established on December 8, 1991, and the leaders of the Republic of Belarus, the Russian Federation, and Ukraine signed an a →
In 2009, an unknown programmer by the name of Satoshi Nakamoto put forward a whitepaper that proposed a creation of new form of digital currency - cryptocurrency. Cryptocurrency functions the same way as regular currencies do in that its used as a means of exchange, unit of account and a store of va →
Headquarter: New Delhi Function and Objective of the Organization: The Food Safety and Standards Authority of India (FSSAI)has been established under Food Safety and Standards Act, 2006 which consolidates various acts & orders that have hitherto handled food-related issues in various Ministries →
If you contribute your content to our site. Please mail us your content to editor@onlinegk.net