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Harry Brearley has invented

  • Electric iron
  • Electromagent
  • Stainless Steel
  • Gramophone

Answer: Option C

Explanation:

Harry Brearley of England has invented Stainless Steel in 1913,

Electric iron has been invented by H.W. Seeley of USA in 1882,

Electromagent has been invented by W.Sturgeon of England in 1824,

Gramophone has been invented by T.A. Edison of USA in 1878.

Similar Questions :

1. Which instrument is used to measure heat radiation ?

  • Radar
  • Salinometer
  • Refractometer
  • Radio micrometer

Answer: Option D

Explanation:

Radar - is used to detect the direction and speed of an object by means of radiowaves,

Salinometer - is used to determine salinity of solutions,

Refractometer - is used to measure refractive indices.

2. Harry Brearley has invented

  • Electric iron
  • Electromagent
  • Stainless Steel
  • Gramophone

Answer: Option C

Explanation:

Harry Brearley of England has invented Stainless Steel in 1913,

Electric iron has been invented by H.W. Seeley of USA in 1882,

Electromagent has been invented by W.Sturgeon of England in 1824,

Gramophone has been invented by T.A. Edison of USA in 1878.

3. If lift is going up with acceleration, the apparent weight of a body is

  • may be more or less than true weight
  • equal to the true weight
  • less than the true weight
  • more than the true weight

Answer: Option D

4. Nuclear sizes are expressed in a unit named

  • Fermi
  • Angstrom
  • Newton
  • Tesla

Answer: Option A

5. What is the relation between wavelength, frequency and velocity ?

  • velocity of wave = frequency * wavelength
  • velocity of wave = frequency/wavelength
  • velocity of wave = wavelength/frequency
  • None of above

Answer: Option A

Read more from - Physics Questions Answers
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