Q14. yaid d` v yamaana pr kaya- krta
bala
%varNa ]%pnna krta hO tao nyaU T na ko gait ko dU s aro isaWant ko Anau s aar :
If a force ‘f’ action on a mass ‘m’ produces acceleration ‘a’ then as per
Newton’s second law of motion :
(A) f = ma
(B) f = a/m
(C) f = m/a
(D) m = af
Ans : A
Q15. tIna saM Q aair~ ijanakI Qaairta 1
F tqaa 6
F hO EaM R K laa k` m a mao M jaao D , o gayao hO [sa saM y aao j ana kI samakxa
F, 2
µ
µ
µ
Qaairta
hO .
The three capacitors whose capacitances are 1
F, 2
F and 6
F are
µ
µ
µ
connected in a series. The equivalent capacitance of the combination is
(A) 2/5
µ
F
(B) 3/5
µ
F
(C) 1/3
µ
F
(D) 1/5
µ
F
Ans : B
Q16. LCR pirpqa mao M vaO k ilpk Qaara AiQaktma hao t I hO jaba
.
The alternating current in LCR circuit is maximum when
2
2
(A) X
=0
(B) X
=0
(C) X
= X
(D) X
+X
=1
L
C
L
C
L
C
Ans : C
Q17. karnaa^ T [M j ana kO xamata jaao jala ko @vaqanaaM k tqaa galanaaM k ko maQya kama kr rha hO hao g aI
The efficiency of a Cornot engine working between the steam point and ice
point is
(A) 28.8 %
(B) 27.8 %
(C) 26.8 %
(D) 23.8 %
Ans : C
Q18. ro l avao pTiryaaM maao D , a o M pr Jau k I hao t I hO taik
Railway tracks are banked on curves so that
(A) PaTrI AaO r pihyaao M ko baIca kao [ - GaYa- N a bala pO d a na hao s/No frictional force may be produced
between the tracks and wheels
(B) ro l agaaD, I Andr kI Aao r na igaro M /The train may not fall down inward
(C) pTrI ko karNa saamaanya p` i tik` y aa ko xaO i tijaya GaTk sao AavaSyak AiBako n d` bala p` a Pt ikyaa jaa sako
/Necessary centripetal force may be obtained from the horizontal component
of normal reaction due to the track
[namao M sao kao [ - nahIM /None of the above
(D)
Ans : C
Q19. dU r saM c aar mao M p` y aao g a mao M laa[- jaanao vaalaI ivaVu t cau m bakIya trM g ao _____ hao t I hO M .
The electromagnetic waves used in the telecommunication are_____.
(A) prabaO M g anaI/Ultraviolet
(B) Avar@t/Infra-red
(C) dR S yak/Visible
(D) saU x ma trM g ao M /Microwave
Ans : D
Q20. 60 iklaao g a` a ma vajana ka ek baalak jaao ik 10 maITr p` i t sao k M D kI gait sao daO D , rha hO ka saM v ao g a __ hao g aa.
The momentum of a boy of 60 Kg weight running at 10 m/s is
(A) 500 Kg m/s
(B) 600 Kg m/s
(C) 550 Kg m/s (D) 450 Kg m/s
Ans : B