1.How many bones present in Human ears?
Answer: 6
2.Which device is used to measure very low temperature?
Answer: Cryometer
3,What is the source of energy in sun and Stars?
Answer: Conversion of hydrogen into helium and Nuclear Fusion
4.What is the hearing range of human car?
Answer: 20 HZ to 20,000 HZ
5.Name the device which directly converts solar energy into electrical energy?
Answer: Photovoltaic Cell
6.What is the acceleration due to Gravity at Center of the Earth?
Answer: 0
7.What is the SI unit of electromagnetic induction(EMI)?
Answer: Tesla
8.Atomic Theory of Matter was given by?
Answer: Dalton
9.Fe has 26 protons in its nucleus.What are the number of electron in Fe2+?
Answer: 24
10.An atom of an element has atomic number 17 and mass number 36. The number of neutrons
in its nucleus is....?
Answer: 19
11.What effect will be on acceleration due to gravity if the radius of earth is
decreased?
Answer: Increase
12.Which device is used to measure Radioactivity?
Answer: Calorimeter
13.What is the height of geostationary satelllite from the Earth?
Answer: 3600km OR 3800km
14.What is the Working principal of washing machine?
Answer: Centrifugation
15.What is the SI unit of Torque?
Answer: Newton Meter
16.What is the purpose of choke in tube light?
Answer: Reduce current in the circuit
17.What is the SI unit of electrical conductavity?
Answer: mho
18.Who invented the bettery?
Answer: Volta
19.What is the size of atom?
Answer: 10^-10 meter or 10^-8 centimeter
20.Element which have same atomic number but different mass number are called...?
Answer: Isotope
21.Which rays is not emitted from redioactive elements?
Answer: Cathod rays
22.What is the melting point if ice on kelvin scale?
Answer: 273
23.Process through which the body manufactures blood cells in bone marrow is called?
Answer: Hematopoiesis
24.Who is regarded as Father of Medicine?
Answer: Hippocrates
25.Alzheimer affects which part of human body?
Answer: Brain
26.Where is pituitary gland located in human body?
Answer: Brain
27.What is the normal blood pressure of human?
Answer: 120/80 mm Hg
28.Name the largest gland in human body?
Answer: Liver
29.Name the branch of science which is related to study of teeth?
Answer: Odontology
30.Name of hardest part of human body
Answer: Enamel
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