ELEC­TRI­CAL EN­GI­NEER­ING MOST IM­POR­TANT MCQ PART 1

ELECTRICAL ENGINEERING MOST IMPORTANT MCQ

1. The ratio of voltage and electric current in a closed circuit

ANSWER :- in­creases

2. The curve rep­re­sent­ing ohm's law is

ANSWER :- Lin­ear

3. The re­sis­tance of wire varies in­versely as

ANSWER :- area of cross sec­tion

4 KCL is ap­plic­a­ble only to

ANSWER :- junc­tions in a net­work

5. KVL is con­cerned with

ANSWER :- junction node

6. Cells are con­nected in se­ries in or­der to in­crease the

ANSWER :- volt­age rat­ing

7. Cells are con­nected in par­al­lel in or­der to in­crease

ANSWER :- cur­rent ca­pac­ity

8. When two cells are con­nected in par­al­lel , it should en­sure that 
have

ANSWER :- equal emfs

9.The ca­pac­ity of a bat­tery is ex­pressed in a.

ANSWER :- am­peres-hour

10. which one is clas­si­fied as in­te­grat­ing in­stru­ment?

ANSWER :- am­pere-hour me­ter & en­ergy me­ter

11. If a volt­meter is con­nected like a am­me­ter in se­ries with a load

ANSWER :- Al­most no cur­rent will flow in the cir­cuit

12. A mul­ti­range in­stru­ment (am­me­ter or volt­meter) has

ANSWER :- Mul­ti­ple shunt or se­ries re­sis­tances in­side the me­ter

13. The S.I. unit of power is

ANSWER :- watt

14. Elec­tric pres­sure is also called

ANSWER :- volt­age

15. Con­duc­tance is rec­i­p­ro­cal of

ANSWER :- re­sis­tance

16. With rise in tem­per­a­ture the re­sis­tance of pure met­als

ANSWER :- In­creases

17. With rise in tem­per­a­ture the re­sis­tance of semi-con­duc­tors

ANSWER :- de­creases

18. An in­stru­ment which de­tects elec­tric cur­rent is known as

ANSWER :- gal­vanome­ter

19. Which of the fol­low­ing ma­te­r­ial has nearly zero tem­per­a­ture 
co-ef­fi­cient of re­sis­tance? 

ANSWER :- Man­ganin

20. Two re­sis­tors are said to be con­nected in se­ries when

ANSWER :- same cur­rent passes in turn through both

21. Which of the fol­low­ing ma­te­ri­als has a neg­a­tive tem­per­a­ture co-ef­fi­cient of re­sis­tance?

ANSWER :- Car­bon

22. Varis­tors are

ANSWER :- non-lin­ear re­sis­tors

23. In­su­lat­ing ma­te­ri­als have the func­tion of

ANSWER :- pre­vent­ing a short cir­cuit be­tween con­duct­ing wires

24. The rat­ing of a fuse wire is al­ways ex­pressed in

ANSWER :- am­peres

25. The min­i­mum charge on an ion is

ANSWER :- equal to the charge of an elec­tron

26. The re­sis­tance of a few me­tres of wire con­duc­tor in closed elec­tri­cal cir­cuit is

ANSWER :- prac­ti­cally zero

27. If a par­al­lel cir­cuit is opened in the main line, the cur­rent

ANSWER :- is zero in all branches

28. The hot re­sis­tance of the bulb's fil­a­ment is higher than its cold re­sis­tance be­cause the tem­per­a­ture co-ef­fi­cient of the fil­a­ment is

ANSWER :- pos­i­tive

29. Heat in a con­duc­tor is pro­duced on the pas­sage of elec­tric cur­rent due to

ANSWER :- re­sis­tance

30. The in­su­la­tion on a cur­rent car­ry­ing con­duc­tor is pro­vided

-to pre­vent leak­age of cur­rent

-to pre­vent shock

-both of above fac­tor