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General science NCERT MCQ Questions | Test Paper 27

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General Science MCQ Questions For Competitive exams

Test Paper 27

 

Learn General science NCERT MCQ Questions 

 

1. What are MCB which are used in electric circuits ?

a) Mini circuit breaker

b) Maximum circuit breaker

c) Miniature circuit breaker

d) Maxiature circuit breaker

  c) Miniature circuit breaker

 

2. Can electric current used to make magnets ?

a) Yes

b) No

   a) Yes

 

3. Electric bulb was invented by ?

a) Newton

b) Henry

c) Thomas Alva Edison

d) None

  c) Thomas Alva Edison

 

4. Who studied for the first about phenomenon and properties of electricity ?

a) Coulomb

b) William Gilbert

c) Ohm

d) None

  b) William Gilbert

 

5. The minimum amount charge transferred from one body to another is equal to ?

a) Charge of Neutron

b) Charge of Proton

c) Charge of Electron

d) None

  c) Charge of Electron

 

6. Charge(q) is expressed as ?

a) q = ne

b) q= n/e

c) q = n + e

d) q = n – e

Note: e= No of electrons ; e= Magnitude of charge

  a) q = ne

 

7. Magnitude of charge of electron =

a) 1.602×10⁻¹⁹

b) 2.602×10⁻¹⁹

c) 3.602×10⁻¹⁹

d) None

  a) 1.602×10⁻¹⁹

 

8. Unit of charge ?

a) Coulomb

b) Coulomb/Area

c) Coulomb*Area

d) None

   a) Coulomb

 

9. Which of the following scientist classified charge into 2 types, i e., Positive and negative charge ?

a) Benjamin Franklin

b) Henry

c) Thomas Alva Edison

d) None

   a) Benjamin Franklin

 

10. Size of a soap bubble increases when we apply ?

a) Opposite charges

b) Same Charges 

c) Both

d) None

   b) Same Charges

 

11.  Charge attain stability on the surface of ?

a) Round circle shaped body

b) Rectangle shaped body

c) Hallow body

d) All the above

   c) Hallow body

 

12. Who invented Lightening conductor ?

a) Benjamin Franklin

b) Henry

c) Thomas Alva Edison

d) None

   a) Benjamin Franklin

 

13. In general electricity is classified into ?

a) Static electricity

b) Current (AC/DC)

c) Both

d) None

  c) Both

 

14. In Xerox, which of the following electricity is used ?

a) Static electricity 

b) DC electricity 

c) Both

d) None

  a) Static electricity

 

15. Rate of flow of charge is called as ?

a) Static electricity 

b) DC electricity 

c) AC electricity 

d) Electricity 

  d) Electricity

 

16. Current is expressed as ?

a) q × t

b) q + t

c) q – t

d) q / t 

Note: q = Charge; t = time

  d) q / t

 

17.  One Ampere ?

a) 1 coulomb +1 second

b) 1 coulomb – 1 second

c) 1 coulomb × 1 second

d) 1 coulomb / 1 second

  d) 1 coulomb / 1 second

 

18.  If the direction of flow of current varies from positive to negative and negative to positive alternatively is called

a) AC Current

b) DC Current

c) Both

d) None

  a) AC Current

 

19. If the direction of flow of current is unique, then it is called

a) AC Current

b) DC Current

c) Both

d) None

  b) DC Current

 

20. Materials which allows flow of charge is called as ?

a) Electrical conductors

b) Electrical Insulators

c) Both

d) None

  a) Electrical conductors

 

21. Materials which doesn’t allows flow of charge is called as ?

a) Electrical conductors

b) Electrical Insulators

c) Both

d) None

  b) Electrical Insulators

 

22. Electric conductors are ?

a) Silver

b) Copper

c) Aluminium

d) All the above

  d) All the above

 

23. Electrical Insulators are ?

a) Diamond

b) Plastic material

c) Pure Water

d) All the above

  d) All the above

 

24. Best Electrical conductors are ?

a) Mercury

b) Ordinary water

c) Pure Water

d) A and B

  d) A and B

 

25. Silicon, Germanium and Selenium are

a) Insulator

b) Conductor

c) Semi Conductor

d) None

  c) Semi Conductor

26. Silicon is available is in form of

a) SiO2

b) SiO3

c) SiO

d) None

  a) SiO2

 

27.  Unit of electric potential ?

a) Watt

b) Volt

c) Both

d) None

  b) Volt

 

28. Positive charge flow from ?

a) Low potential to High potential

b) High potential to Low potential 

c) Both

d) None

  b) High potential to Low potential

 

29. Negative charge flow from ?

a) Low potential to High potential 

b) High potential to Low potential 

c) Both

d) None

  a) Low potential to High potential

 

30. If temperature of the metals increases, Resistance ?

a) Increases

b) Decreases

c) Constant

d) None

  a) Increases

 

31. If temperature of the metals decreases, Resistance ?

a) Increases

b) Decreases

c) Constant

d) None

  b) Decreases

 

32 .If temperature of metal and electric resistance increases, then strength of current ?

a) Increases

b) Decreases

c) Constant

d) None

  b) Decreases

 
33. If temperature of metal and electric resistance decreases, then strength of current ?

a) Increases

b) Decreases

c) Constant

d) None

  a) Increases

 

34. Magnitude of electrical resistance remains same either on increasing or decreasing of

a) Voltage

b) Temperature

c) Both

d) None

  b) Temperature

 

35. In semiconductor, On increase of temperature, Resistance ?

a) Increases

b) Decreases

c) Constant

d) None

  b) Decreases

 

36. In semiconductor, On decrease of temperature, Resistance ?

a) Increases

b) Decreases

c) Constant

d) None

  a) Increases

 

37. At Absolute temperature, semiconductors behaves like 

a) Perfect Insulator

b) Perfect Conductor

c) Semi Conductor

d) None

  a) Perfect Insulator

 

38. Absolute temperature ?

a) -272⁰ C

b) 272-⁰ C

c) 0⁰ C

d) -273⁰ C

  d) -273⁰ C

 

39. Pure water has ___________ ?

a) Less resistance

b) More resistance

c) Normal resistance

d) None

  b) More resistance

 

40. Salt water is called as ?

a) salt solution 

b) Brine Solution 

c) Salty 

d) None

  b) Brine Solution

 

41. Low Voltage means ?

a) High resistance and High current

b) Low resistance and High current

c) High resistance and Low current

d) Low resistance and Low current

  c) High resistance and Low current

 

42. High Voltage means ?

a) High resistance and High current

b) Low resistance and High current

c) High resistance and Low current

d) Low resistance and Low current

  b) Low resistance and High current

 

43. Resistance of conductor whose length having 1 unit and area of cross section also 1 unit is called as ?

a) Resistance

b) Specific Resistance

c) Specific Conductance

d) None

  b) Specific Resistance

 

44. Units of Conduction ?

a) Siemen

b) ohm

c) ohm per meter

d) None

  a) Siemen

 

45. Energy used to drive charge from one point to another in electrical conductor is called as ?

a) Electro force

b) Electro Motive force

c) Electric motive effect

d) All the above

  c) Electric motive effect

 

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