General Awareness on Science | GK Objective Questions and Answers on Physics

Questions

6 Which of the following is related to threshold frequency ?

A Photo current decreases with voltage

B Photo electric emission is not possible

C Photo current increases with voltage

D Photo current is constant

Answer: Option [B]

7 The instrument used to study the laws of vibrating string is :

A Hydrometer

B Hygrometer

C Sonometer

D Electrometer

Answer: Option [C]

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8 Which device is used to measure the wavelength of X-rays ?

A Framing square

B Spectrometer

C Manometer

D SWR meter

Answer: Option [B]

9 The hydraulic press depends upon :

A Coulomb's law

B Pascal's principle

C Boyle's law

D Bernouli's principle

Answer: Option [B]

10 The Newton's first law is also referred to as :

A Law of inertia

B Law of friction

C Law of moments

D Law of motion

Answer: Option [A]