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Q.6 In a resonance column first and second
resonance are obtained at depths 22.7 cm and
70.2 cm. The third resonance will be obtained at
a depth -
(1) 117.7 cm (2) 92.9 cm
(3) 115.5 cm (4) 113.5 cm
Q.7 An electron having K.E.E is moving in a circular
orbit of radius R perpendicular to a uniform
magnetic field induction B r . If kinetic energy is
doubled and magnetic field induction is tripted the
radius will become-
3
(1) R
2
3
(2) R
2
2
(3) R
9
2
(4) R
3
Q.8 An inductor of inductance L and resistor of
resistance R are joined in series and connected
by a source of frequency ω. Power dissipated in
the circuit is-
(1)
(3)
2 2
ω
2
( R +
V
L )
( R
2
V
2
2
+ ω L )
(2)
( R
2
V
2
(4) 2
R
2
2
+ ω L )
2
V
2
2
R + ω L
Q.9 The photoelectrons emitted by ultraviolet rays and
X-rays from the same metallic surface differ in -
(1) rest mass
(2) velocity
(3) both in rest mass and velocity
(4) neither in rest mass nor in velocity
Q.10 The different stages of discharge in a discharge
tube can be explained on the basis of -
(1) the wave nature of light
(2) the dual nature of light
(3) the wave nature of electrons
(4) the collision between the charged particles
emitted from the cathode and the atoms of
the gas in the tube
Q.11 Blue light can cause photoelectric emission from
a metal, but yellow light cannot. When a red
light is incident on the metal, then -
(1) photoelectric current will increase
(2) photoelectric current will decrease
(3) no photoelectric emission will occur
(4) any one of the above
Q.6 ,d vuqukn LrEHk esa izFke o f}rh; vuqukn 22.7 cm
o 70.2 cm xgjkbZ ij izkIr gksrs gSA r`rh; vuqukn
fdruh xgjkbZ ij izkIr gksxk -
(1) 117.7 cm (2) 92.9 cm
(3) 115.5 cm (4) 113.5 cm
Q.7 ,d bysDVªkWu ,d ,dleku pqEcdh; {ks=k ds yEcor~
R f=kT;k dh ,d o`Ùkkdkj d{kk esa xfr dj jgk gSA
;fn xfrt ÅtkZ nqxquh gS rFkk pqEcdh; {ks=k f=kxquk
gS] rks f=kT;k gksxh -
3
(1) R
2
3
(2) R
2
2
(3) R
9
2
(4) R
3
Q.8 L izsjdRo dk ,d izsjd rFkk R izfrjks/k dk ,d
izfrjks/kd Js.khØe esa tqM+k gqvk gS rFkk ω vko`fÙk ds
,d L=kksr }kjk la;ksftr gSA ifjiFk esa O;f;r 'kfä gS -
CAREER POINT, CP Tower, Road No.1, IPIA, Kota (Raj.), Ph: 0744-3040000 Page # 3
(1)
(3)
2 2
ω
2
( R +
V
L )
( R
2
V
2
2
+ ω L )
(2)
( R
2
V
2
(4) 2
R
2
2
+ ω L )
2
V
2
2
R + ω L
Q.9 leku /kkfRod lrg ls ijkcSxuh fdj.kksa rFkk
X-fdj.kksa }kjk mRlftZr QksVksbysDVªkWu fHkUu gksrs gS -
(1) fojke nzO;eku esa
(2) osx esa
(3) fojke nzO;eku o osx nksuksa esa
(4) uk rks fojke nzO;eku vkSj uk gh osx esa
Q.10 ,d fujkosf'kr ufydk esa fujkos'ku dh fHkUu fLFkr;ksa
dh fdlds vk/kkj ij O;k[;k dh tk ldrh gS -
(1) izdk'k dh rjax izd`fr
(2) izdk'k dh }Sr izd`fr
(3) bysDVªkWuksa dh rjax izd`fr
(4) dSFkksM ls mRlftZr vkosf'kr d.kksa ,oa ufydk esa
xSl ds ijek.kqvksa ds e/; VDdj
Q.11 uhyk izdk'k ,d /kkrq ls izdk'kfo|qr mRltZu dk
dkj.k gks ldrk gS ijUrq ihyk izdk'k ugha gks ldrkA
tc ,d yky izdk'k /kkrq ij vkifrr gksrk gS] rc -
(1) izdk'k fo|qr /kkjk c