1

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 -yttasf
No. of Page: 4 ROLL NO.
No. of Q.: 20 K122
ranfte tT - 2023-24
Class - XII
Time:3.15 Hrs. M.M. : 40

1.

(#) 0° (G) 180°

(T) 45° () 90°

(#) 0.22 ( ) 0.5 2

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 HN
HarftG VâgT, 2023-24
faqy-faes far& (Physics)
paT-XIl (qoits : 40
H4 : 3.15 Er
RgUg- 31 (Section A)

Select the correct answer : 3/4

(i) (T) yfq () A
(a) a e
(6) A
The unit of charge is : (d) Newton
(a) Coulomb (b) Volt (c) Ampere

( ) 44F (1) 6F (4) 8uF

(#) 2uF
B
A 2uF 3uF
between A and B:
Find the equivalent capacitance of a given circuit
(a) 2uF (b) 4 uF
(c) 6uF (d) 8uF
3/4

(*) faya hf (G) ts 3f

() hI
In what form is encrgy stored in a current carrying coil:
(a) Electrical energy (b) Magnetic energy
(c) Heat (d) None of these
agd 4ca 220 V 3d 100 W zifa fr TI TI a
(iv)
3/4
(#) 2422 (T) 440 S2
(T) 484 S2 (9) 220 2
Aightbulb is rated at 100 Wfor a220Vsupply.Find the resistance ofthe bulb:
(a) 242 S2 (b) 440 2 (c) 484 S2 (d) 220 S
3/4
(#) 3x l0 /s () 3x 10 m/s
(1) 3x l0 m/s (3) 3x I0 m/s
The velocity of electromagnetic waves in vacuum is :
a 3x 10 m/s (b) 3x 10° m/s (c) 3x 10° m/s (d) 3x 10 m/s
3/4
 (2

(*)
hc
(a) (1) (»
The energy of a photon of wavelength 2 is :
(a)A
ho (6) (4)
3/4
(#) A/m () Am ()A xm (9) A x m
What is the unit of pole strength :
(a) A/m (b) Alm? (c) Ax m (d) A x m²
3/4
(*) RA ( ) R« 423 () R« AW3 () Re4²
The relation betwcenRe/Der
mass nu and Irradius Rof nucleus is:
A
(6) (c) Rs3
(a) R A (d) R«A
2. frR FA Fill in the blanks :
3/4
Due to a electric dipole the potential at equatorial line is
3/4
The nature of electro magnetic waves is .......

When the potential is less than the stopping potential, the value of photoeleçtrie
curent is ...
3/4

A classical atom based on ...... is doomed to collapse.

Answer the following questions in one words or one line.

3/4
Two electic field lines never intersect to each other, why ?
3/4
Write the dimensional formula of electric potential ?
(ii) 3T< sriter sfrufdI nfgu? 3/4
What is the value of resistançe of an ideal ammeter ?
3/4
Write down S.I. unit of magnetic flux,?
(v) 644 mH a220 V, 50 Hz hi AAA0 r 3 g AI Vyg
314
A 44 mH inductor is connected to 220 V, 50 Hz ac supply. Determine the rms
value of the curent in the circuit ?
3/4
Write the relation between critical angle and refractive index of any substance ?
 (3)

3/4
Write formula related to Malus law ?
314
Write the order of radius of atoms.
Us- (Section-B)
4. () 3G H f4 fetfeu?

() Define Gauss's law ?

(In) A infinite line charge produces a field of 9x 10* N/C. at a distance of 2 cm.
Calculate the linear charge density?

Define the solenoid obtain the formula of magnetic field in the middle of a long
current carrying solénoid ?

Define : () Dimagnetic substances (i) Intensity of magnetisation

K+1=1%
() Write Lenz's law ?
(G) Lenz's law obey's law of conservation of energy. Explain.

K+1=1%
Obtain the expression of root mean square current in a complete cycle of
alternating current and define it ?
9. 30 kV a SYT X-fhrui (a) 3oda4 3Igfa, (b) fH TTt
+%=1%
Find the (a) maximum frequency and (b) minimum wave length of X-rays
produced by 30 kV electrons ?
10. THrgK tst f i ftf?
Write two short comings of Rutherford's model of the atom ?
+%=1"
Define : () mass defect,() Nuclar binding energy
g-H(Section-C)
1+1+1=3

(i) Define current density and write its unit ?

 (4)
(i) Write the name of two factors on which the resistivity is depends ?
(ii) Write the current's law of Kirchoff ?
34/OR

(i) Define drift velocity and write the unit of it ?

(ii) Write the name of two non-ohmic devices ?
(iii) Write the relation between current and drift velocity ?

ffe? 1+2=3
What do you understand by interference of light waves ? Mention the necessary
conditions for constructive and destructive interference ?
314GVOR

Explain the structure of polaroid. How can we identify polarised and unpolarised
light with the help of a polaroid ?

f? 1+1+1=3
Distinguish between conductors, insulators and semiconductors on the basis of
band theory of solids ?

Describe the method of obtaining characteristics curves of forward and reverse

bias for a P-Njunction diode ? Draw necessary circuit diagram.
GUg - (Section-D)
I+2+1=4
Explain the constructing, working and deduce the formula of magnifying power of
compound microscope ?
4YaUOR

Define sphericl mirror. For this establish a relation between object distance
image distance v, and focal length f? And write any two uses ofconcave mirror ?.
 HN
HarftG VâgT, 2023-24
faqy-faes far& (Physics)
paT-XIl (qoits : 40
H4 : 3.15 Er
RgUg- 31 (Section A)

Select the correct answer : 3/4

(i) (T) yfq () A
(a) a e
(6) A
The unit of charge is : (d) Newton
(a) Coulomb (b) Volt (c) Ampere

( ) 44F (1) 6F (4) 8uF

(#) 2uF
B
A 2uF 3uF
between A and B:
Find the equivalent capacitance of a given circuit
(a) 2uF (b) 4 uF
(c) 6uF (d) 8uF
3/4

(*) faya hf (G) ts 3f

() hI
In what form is encrgy stored in a current carrying coil:
(a) Electrical energy (b) Magnetic energy
(c) Heat (d) None of these
agd 4ca 220 V 3d 100 W zifa fr TI TI a
(iv)
3/4
(#) 2422 (T) 440 S2
(T) 484 S2 (9) 220 2
Aightbulb is rated at 100 Wfor a220Vsupply.Find the resistance ofthe bulb:
(a) 242 S2 (b) 440 2 (c) 484 S2 (d) 220 S
3/4
(#) 3x l0 /s () 3x 10 m/s
(1) 3x l0 m/s (3) 3x I0 m/s
The velocity of electromagnetic waves in vacuum is :
a 3x 10 m/s (b) 3x 10° m/s (c) 3x 10° m/s (d) 3x 10 m/s
3/4
 (2

(*)
hc
(a) (1) (»
The energy of a photon of wavelength 2 is :
(a)A
ho (6) (4)
3/4
(#) A/m () Am ()A xm (9) A x m
What is the unit of pole strength :
(a) A/m (b) Alm? (c) Ax m (d) A x m²
3/4
(*) RA ( ) R« 423 () R« AW3 () Re4²
The relation betwcenRe/Der
mass nu and Irradius Rof nucleus is:
A
(6) (c) Rs3
(a) R A (d) R«A
2. frR FA Fill in the blanks :
3/4
Due to a electric dipole the potential at equatorial line is
3/4
The nature of electro magnetic waves is .......

When the potential is less than the stopping potential, the value of photoeleçtrie
curent is ...
3/4

A classical atom based on ...... is doomed to collapse.

Answer the following questions in one words or one line.

3/4
Two electic field lines never intersect to each other, why ?
3/4
Write the dimensional formula of electric potential ?
(ii) 3T< sriter sfrufdI nfgu? 3/4
What is the value of resistançe of an ideal ammeter ?
3/4
Write down S.I. unit of magnetic flux,?
(v) 644 mH a220 V, 50 Hz hi AAA0 r 3 g AI Vyg
314
A 44 mH inductor is connected to 220 V, 50 Hz ac supply. Determine the rms
value of the curent in the circuit ?
3/4
Write the relation between critical angle and refractive index of any substance ?
 (3)

3/4
Write formula related to Malus law ?
314
Write the order of radius of atoms.
Us- (Section-B)
4. () 3G H f4 fetfeu?

() Define Gauss's law ?

(In) A infinite line charge produces a field of 9x 10* N/C. at a distance of 2 cm.
Calculate the linear charge density?

Define the solenoid obtain the formula of magnetic field in the middle of a long
current carrying solénoid ?

Define : () Dimagnetic substances (i) Intensity of magnetisation

K+1=1%
() Write Lenz's law ?
(G) Lenz's law obey's law of conservation of energy. Explain.

K+1=1%
Obtain the expression of root mean square current in a complete cycle of
alternating current and define it ?
9. 30 kV a SYT X-fhrui (a) 3oda4 3Igfa, (b) fH TTt
+%=1%
Find the (a) maximum frequency and (b) minimum wave length of X-rays
produced by 30 kV electrons ?
10. THrgK tst f i ftf?
Write two short comings of Rutherford's model of the atom ?
+%=1"
Define : () mass defect,() Nuclar binding energy
g-H(Section-C)
1+1+1=3

(i) Define current density and write its unit ?

 (4)
(i) Write the name of two factors on which the resistivity is depends ?
(ii) Write the current's law of Kirchoff ?
34/OR

(i) Define drift velocity and write the unit of it ?

(ii) Write the name of two non-ohmic devices ?
(iii) Write the relation between current and drift velocity ?

ffe? 1+2=3
What do you understand by interference of light waves ? Mention the necessary
conditions for constructive and destructive interference ?
314GVOR

Explain the structure of polaroid. How can we identify polarised and unpolarised
light with the help of a polaroid ?

f? 1+1+1=3
Distinguish between conductors, insulators and semiconductors on the basis of
band theory of solids ?

Describe the method of obtaining characteristics curves of forward and reverse

bias for a P-Njunction diode ? Draw necessary circuit diagram.
GUg - (Section-D)
I+2+1=4
Explain the constructing, working and deduce the formula of magnifying power of
compound microscope ?
4YaUOR

Define sphericl mirror. For this establish a relation between object distance
image distance v, and focal length f? And write any two uses ofconcave mirror ?.
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No. of Page :2 ROLL NO. S-98
No. of Q.:26
HafaR yErgT- 2023-24
Class- 12
Time :3.15 Hrs. farqy - fta farH M.M. : 40

(3) V (a) V=
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A-103-(XI) tfra farT -3100