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

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]


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]


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