[MCQ 41] Which instrument is used to measure the atmospheric pressure?
[A] Hygrometer
[B] Barometer
[C] Thermometer
[D] picometer
[Answer]
[B] Barometer
[MCQ 42] The theory of thermal ionization is published by
[A] S.N Bose
[B] Albert Einstein
[C] Meghnad Saha
[D] Rutherford
[Answer]
[C] Meghnad Saha
[MCQ 43] What is the value of absolute temperature in Fahrenheit scale?
[A] 0° F
[B] − 273° F
[C] − 459.67° F
[D] − 373° F
[Answer]
[C] − 459.67° F
[MCQ 44] In which direction the frictional force acts?
[A] along the direction of motion of the particle
[B] opposite to the direction of motion of the particle
[C] perpendicular to the direction of motion of the particle
[D] in any direction
[Answer]
[B] opposite to the direction of motion of the particle
[MCQ 45] Which of the following is not a magnetic material?
[A] Fe
[B] Ni
[C] Co
[D] Zn
[Answer]
[D] Zn
[MCQ 46] Kinetic energy converts into electric energy in
[A] Transformer
[B] Dynamo
[C] Motor
[D] Battery
[Answer]
[B] Dynamo
[MCQ 47]
[A]
[B]
[C]
[D]
[Answer]
Φp = sin–1 [n2/n1]