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Answer the following questions.
Q.25 Steady state current in resistance 30 kΩ is -
(1) 0.52 mA (2) 1.25 mA
(3) 0.33 mA (4) 1.72 mA
Q.26 Charge on the capacitor in the steady state is -
(1) 36µC (2) 32µC (3) 30 µC (4) 25µC
Passage : 2 (Ques. 27 to 28)
A ball of mass 20kg moving with velocity of
10 m/s explodes in two equal parts. First part
moves with 10 m/s in opposite direction
Q.27 Velocity of the second part is
(1) 10 m/s (2) 20 m/s (3) 30 m/s (4) 40 m/s
Q.28 Gain of kinetic energy of the system in the
explosion -
(1) 4000 J (2) 2000 J (3) 3000 J (4) 1000 J
A & R Type Questions :
The following questions given below consist
of an Assertion and Reason Type questions.
Use the following Key to choose the
appropriate answer.
(A) If both Assertion & Reason are True &
Reason is a correct explanation of the
Assertion.
(B) If both Assertion & Reason are True but
Reason is not a correct explanation of the
Assertion.
(C) If Assertion is True but the Reason is
False.
(D) If both Assertion and Reason are False.
Q.29 Assertion : When a p-type semi conductor is
constructed from pure semi conductor then not
only number of hole increases but also number
of free electron decreases.
Reason : When imparity is added in pure
semiconductor number of recombination
increases.
(1) A (2) B (3) C (4) D
Q.30 Assertion : A photon has no rest mass, yet it
carries definite momentum.
Reason : Momentum of a photon is due to its
energy and hence its equivalent mass.
(1) A (2) B (3) C (4) D
fuEufyf[kr iz'uksa ds mÙkj nhft,A
Q.25 30 kΩ izfrjks/k esa LFkk;h voLFkk /kkjk gS -
(1) 0.52 mA (2) 1.25 mA
(3) 0.33 mA (4) 1.72 mA
Q.26 LFkk;h voLFkk esa la/kkfj=k ij vkos'k gS -
(1) 36µC (2) 32µC (3) 30 µC (4) 25µC
x|ka'k 2 : (iz'u 27 ls 28)
10 m/s ds osx ls xfreku 20 kg nzO;eku dh ,d xsan
nks Hkkxksa esa QwV tkrh gSA igyk Hkkx 10 m/s ds osx ls
foifjr fn'kk esa xfr djrk gS] rks
Q.27 nwljs Hkkx dk osx gS -
(1) 10 m/s (2) 20 m/s (3) 30 m/s (4) 40 m/s
Q.28 foLQksV esa fudk; dh xfrt ÅtkZ esa o`f) gS -
(1) 4000 J (2) 2000 J (3) 3000 J (4) 1000 J
dFku ,oa dkj.k izdkj ds iz'u %
uhps fn;s x;s fuEufyf[kr iz'u "dFku" rFkk
"dkj.k" izdkj ds iz'u gSaA vr% mfpr mÙkj dk
p;u djus ds fy;s fuEu rkfydk dk mi;ksx
dhft;sA
(A) ;fn dFku rFkk dkj.k nksuksa lR; gSa rFkk dkj.k
dFku dk lgh Li"Vhdj.k gSA
(B) ;fn dFku rFkk dkj.k nksuksa lR; gSa ysfdu
dkj.k( dFku dk lgh Li"Vhdj.k ugha gSA
(C) ;fn dFku lR; gS ysfdu dkj.k vlR; gSA
(D) ;fn dFku rFkk dkj.k nksuksa vlR; gSA
Q. 29 dFku : tc ,d p-izdkj dk v)Zpkyd ,d 'kq)
¼uSt½ v)Zpkyd ls fufeZr fd;k tkrk gS] rc u
dsoy gksyks dh la[;k c