General Science Questions and Answers | General Awareness for SSC UPSC NDA CDS Railways PSC Exams

41 Which device is used to convert sound energy into electrical energy ?
A Solar cell
B Gramophone
C Microphone
D Loudspeaker

Answer: Option [C]
42 The device dynamo is used to convert :
A Electrical energy into mechanical energy
B Electrical energy into heat energy
C Mechanical energy into electrical energy
D None of these

Answer: Option [C]
43 Ball pen functions on the principle of :
A Lenz's law
B Surface tension
C Doppler effect
D Gravitional force

Answer: Option [B]
44 Because of _______ red light is used for signals ?
A High frequency
B High intensity
C Long wavelength
D High refraction

Answer: Option [C]
45 Which of the following light rays is used for eliminating bacteria ?
A Alpha rays
B Infrared rays
C Ultra-violet radiation
D Microwave radiation

Answer: Option [C]


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Random GK Questions

A Geneva and Montreal
B Geneva and Vienna
C New York and Geneva
D Washington
Answer: Option [D]
A Johannsen
B Mendel
C Lemark
D Cuvier
Answer: Option [A]
A Max Muller
B Adam Smith
C Karl Marx
D None of these above
Answer: Option [B]
A iron ore and manganese
B precious stone and building materials
C copper and mica
D uranium and aluminium
Answer: Option [B]
A high temperature
B low temperature
C high atmospheric pressure
D low atmospheric pressure
Answer: Option [D]
A Poverty in terms of the prevailing price level
B Poverty in terms of absolute number of people
C Poverty in terms of the absolute level of unemployment
D Poverty in terms of the basic minimum calorie requirements
Answer: Option [D]