PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
PHYSICS
01. ndivisions on the main scale of a vernier callipers 01. n (n + 1)
coincide with (n + 1) divisions on the vernier scale. If x
each division on the main scale is of x units, determine
the least count of the instrument
(1) x/n (1) x/n
x x
(2) (2)
n 1 n 1
x x
(3) (3)
n 1 n 1
2x 2x
(4) (4)
n 1 n 1
02. A screw gauge has main scale divisions of 1 mm each 02. 1 mm
and its circular scale has 50 divisions. While measuring 50
the diameter of a ball, in screw gauge after 14th mark 14 21
ing of main scale and 21st division of circular scale
coincides with the reference line. The measured diam
eter of the ball is –
(1) 14.40 mm (1) 14.40 mm
(2) 14.02 mm (2) 14.02 mm
(3) 14.42 mm (3) 14.42 mm
(4) 14.44 mm (4) 14.44 mm
03. If a dissipative force (F0) acts on a particle of mass ‘m’ 03. (F0), A ‘m’
executing SHM of amplitude 'A' such that F0 = –bv, F0 = –bv,
where ‘v’ is velocity of particle and ‘b’ is a constant ‘v’ ‘b’
then displacement of the particle can be best de
scribed by
2Am 2Am
(1) x(t) cos( t) (1) x(t) cos( t)
bt bt
A A
(2) x(t) cos( t) (2) x(t) cos( t)
mbt mbt
(3) x(t) = Ae–bt/2m (3) x(t) = Ae–bt/2m
(4) x(t) = Ae–bt/2m(cos�t) (4) x(t) = Ae–bt/2m(cos�t)
04. A uniform metre ruler is placed on a fulcrum at its 04. O
midpoint 0. It is having a weight 30 gf at the 10 cm 10 cm 30 gf 40
mark and a weight 20 gf at the 40 cm mark. Based cm 20 gf
upon the above information choose the correct
conclusion
(1) the ruler is in rotational equilibrium (1)
(2) the ruler will turn in anticlockwise sense (2)
(3) the net torque experienced by ruler is zero (3)
(4) the ruler will turn in clockwise sense (4)
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, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
05. Searle's apparatus is used to determine 05.
(1) spring constant of a helical spring (1)
(2) Young's modulus of material (2)
(3) shear modulus of a material (3)
(4) both spring constant and Young's modulus (4)
06. The height to which water will rise in a capillary tube 06. 1 × 10–3 m
of diameter 1 × 10–3 m is–
(given : surface tension of water = 0.072 N/m, angle of ( : = 0.072 N/m, = 0°,
contact = 0°, g = 9.8 m/s2, �water = 103 kg/m3) g = 9.8 m/s , �water = 10 kg/m3)
2 3
(1) 2.94 × 10–2 m (2) 4.2 × 10–2 m (1) 2.94 × 10–2 m (2) 4.2 × 10–2 m
(3) 1.26 × 10–2 m (4) 5.26 × 10–2 m (3) 1.26 × 10–2 m (4) 5.26 × 10–2 m
07. Choose the correct expression for terminal velocity 07.
acquired by a body while falling through a viscous me ( )
dium. (where symbols have their usual meaning)
2 2
(1) ( )g (1) ( )g
9 a2 9 a2
3 a2 3 a2
(2) ( )g (2) ( )g
8 8
2 a2 2 a2
(3) ( )g (3) ( )g
9 9
4 a3 4 a3
(4) ( )g (4) ( )g
3 3
08. The air column in resonance tube experiment behaves 08.
like
(1) a closed organ pipe (1)
(2) an open organ pipe (2)
(3) both (1) and (2) (3) (1) (2)
(4) none of these (4)
09. According to the principle of calorimetry for an iso 09.
lated system
(1) heat lost by part at higher temperature equals the (1)
heat gained by part at lower temperature
(2) heat lost by part at higher temperature is always (2)
less than the heat gained by part at lower tem
perature
(3) heat lost by part at higher temperature is always (3)
more than heat gained by part at lower tempera
ture
(4) heat lost by part at higher temperature is never (4)
equal to heat gained by part at lower temperature
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, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
10. Choose the correct statement regarding meterbridge 10.
(1) a meter bridge works on the principle of nullde (1)
flection
(2) the meter bridge usually consists of a wire of (2) 1m
length 1 m and of uniform crosssectional area
(3) the meter bridge is used for the precise measure (3)
ment of low resistance
(4) all of these (4)
11. In an experiment to find the resistivity of material 11.
using meter bridge, the resistance of wire is 16�. The 16� 1m 1 mm
resistivity of material of wire of length 1 m and radius
1 mm is
(1) 16��× 10–7 �m (1) 16��× 10–7 �m
(2) 16��× 10–6 �m (2) 16��× 10–6 �m
(3) 4��× 10–7 �m (3) 4��× 10–7 �m
(4) 4��× 10–6 �m (4) 4��× 10–6 �m
12. According to Ohm's law current flowing through a con 12.
ductor is directly proportional to the potential differ
ence across its ends provided that
(1) temperature of the conductor remains constant (1)
(2) dimensions of conductor remains constant (2)
(3) temperature and physical conditions keep chang (3)
ing
(4) both (1) and (2) (4) (1) (2)
13. Which of the following is not the precaution in measur 13.
ing the resistance of galvanometer by half deflection
method
(1) emf of the battery should be constant, while (1)
taking reading
(2) use as high value of R as practically possible (2) R
(3) adjust R such that deflection in galvanometer is of (3) R
odd division
(4) the current in the circuit should be put to very (4)
small values
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, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
14. In the experiment to find the focal length of a concave 14.
mirror, using parallax method, a student placed the
object pin at a point so as to obtain an enlarged real
image. He used an image pin in order to locate the
position of this real image of the object pin, by trying
to remove the parallax between the two. Checking for
parallax, he observed that the image of the object pin
moved through greater distance than the image pin, (
with respect to the edge of the mirror, when he moved ) ( )
his eye. The position, across the optical bench (with
respect to the present position of the image pin), of the
image (of the objectpin) is
(1) closer to his eyes (1)
(2) closer to the centre of curvature of the mirror (2)
(3) between the image pin and the centre of curva (3)
ture of the mirror
(4) at the position of the object pin (4)
15. For a prism under minimum deviation condition, con 15.
sider the following statements and choose the correct
option
(1) refracted ray becomes parallel to base of prism (1)
(2) angle of incidence is equal to angle of emergence (2)
(3) angle of deviation becomes equal to angle of prism (3)
(4) both (1 ) and (2) (4) (1) (2)
16. A small pin fixed on a table top is viewed from above from 16. 50 cm
a distance of 50 cm. The distance that pin appear to be
raised if it is viewed from the same point through a 15 cm 15 cm
thick glass slab held parallel to the table is
[Refractive index of glass = 1.5] [ = 1.5]
(1) 5 cm (1) 5 cm
(2) 10 cm (2) 10 cm
(3) 2.5 cm (3) 2.5 cm
(4) 7.5 cm (4) 7.5 cm
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PHYSICS
01. ndivisions on the main scale of a vernier callipers 01. n (n + 1)
coincide with (n + 1) divisions on the vernier scale. If x
each division on the main scale is of x units, determine
the least count of the instrument
(1) x/n (1) x/n
x x
(2) (2)
n 1 n 1
x x
(3) (3)
n 1 n 1
2x 2x
(4) (4)
n 1 n 1
02. A screw gauge has main scale divisions of 1 mm each 02. 1 mm
and its circular scale has 50 divisions. While measuring 50
the diameter of a ball, in screw gauge after 14th mark 14 21
ing of main scale and 21st division of circular scale
coincides with the reference line. The measured diam
eter of the ball is –
(1) 14.40 mm (1) 14.40 mm
(2) 14.02 mm (2) 14.02 mm
(3) 14.42 mm (3) 14.42 mm
(4) 14.44 mm (4) 14.44 mm
03. If a dissipative force (F0) acts on a particle of mass ‘m’ 03. (F0), A ‘m’
executing SHM of amplitude 'A' such that F0 = –bv, F0 = –bv,
where ‘v’ is velocity of particle and ‘b’ is a constant ‘v’ ‘b’
then displacement of the particle can be best de
scribed by
2Am 2Am
(1) x(t) cos( t) (1) x(t) cos( t)
bt bt
A A
(2) x(t) cos( t) (2) x(t) cos( t)
mbt mbt
(3) x(t) = Ae–bt/2m (3) x(t) = Ae–bt/2m
(4) x(t) = Ae–bt/2m(cos�t) (4) x(t) = Ae–bt/2m(cos�t)
04. A uniform metre ruler is placed on a fulcrum at its 04. O
midpoint 0. It is having a weight 30 gf at the 10 cm 10 cm 30 gf 40
mark and a weight 20 gf at the 40 cm mark. Based cm 20 gf
upon the above information choose the correct
conclusion
(1) the ruler is in rotational equilibrium (1)
(2) the ruler will turn in anticlockwise sense (2)
(3) the net torque experienced by ruler is zero (3)
(4) the ruler will turn in clockwise sense (4)
IIT-JEE | NEET | Olympiads 1
, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
05. Searle's apparatus is used to determine 05.
(1) spring constant of a helical spring (1)
(2) Young's modulus of material (2)
(3) shear modulus of a material (3)
(4) both spring constant and Young's modulus (4)
06. The height to which water will rise in a capillary tube 06. 1 × 10–3 m
of diameter 1 × 10–3 m is–
(given : surface tension of water = 0.072 N/m, angle of ( : = 0.072 N/m, = 0°,
contact = 0°, g = 9.8 m/s2, �water = 103 kg/m3) g = 9.8 m/s , �water = 10 kg/m3)
2 3
(1) 2.94 × 10–2 m (2) 4.2 × 10–2 m (1) 2.94 × 10–2 m (2) 4.2 × 10–2 m
(3) 1.26 × 10–2 m (4) 5.26 × 10–2 m (3) 1.26 × 10–2 m (4) 5.26 × 10–2 m
07. Choose the correct expression for terminal velocity 07.
acquired by a body while falling through a viscous me ( )
dium. (where symbols have their usual meaning)
2 2
(1) ( )g (1) ( )g
9 a2 9 a2
3 a2 3 a2
(2) ( )g (2) ( )g
8 8
2 a2 2 a2
(3) ( )g (3) ( )g
9 9
4 a3 4 a3
(4) ( )g (4) ( )g
3 3
08. The air column in resonance tube experiment behaves 08.
like
(1) a closed organ pipe (1)
(2) an open organ pipe (2)
(3) both (1) and (2) (3) (1) (2)
(4) none of these (4)
09. According to the principle of calorimetry for an iso 09.
lated system
(1) heat lost by part at higher temperature equals the (1)
heat gained by part at lower temperature
(2) heat lost by part at higher temperature is always (2)
less than the heat gained by part at lower tem
perature
(3) heat lost by part at higher temperature is always (3)
more than heat gained by part at lower tempera
ture
(4) heat lost by part at higher temperature is never (4)
equal to heat gained by part at lower temperature
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, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
10. Choose the correct statement regarding meterbridge 10.
(1) a meter bridge works on the principle of nullde (1)
flection
(2) the meter bridge usually consists of a wire of (2) 1m
length 1 m and of uniform crosssectional area
(3) the meter bridge is used for the precise measure (3)
ment of low resistance
(4) all of these (4)
11. In an experiment to find the resistivity of material 11.
using meter bridge, the resistance of wire is 16�. The 16� 1m 1 mm
resistivity of material of wire of length 1 m and radius
1 mm is
(1) 16��× 10–7 �m (1) 16��× 10–7 �m
(2) 16��× 10–6 �m (2) 16��× 10–6 �m
(3) 4��× 10–7 �m (3) 4��× 10–7 �m
(4) 4��× 10–6 �m (4) 4��× 10–6 �m
12. According to Ohm's law current flowing through a con 12.
ductor is directly proportional to the potential differ
ence across its ends provided that
(1) temperature of the conductor remains constant (1)
(2) dimensions of conductor remains constant (2)
(3) temperature and physical conditions keep chang (3)
ing
(4) both (1) and (2) (4) (1) (2)
13. Which of the following is not the precaution in measur 13.
ing the resistance of galvanometer by half deflection
method
(1) emf of the battery should be constant, while (1)
taking reading
(2) use as high value of R as practically possible (2) R
(3) adjust R such that deflection in galvanometer is of (3) R
odd division
(4) the current in the circuit should be put to very (4)
small values
IIT-JEE | NEET | Olympiads 3
, PDTS01 | Units & Dimensions, Practical Physics & Error Analysis | 09022026
14. In the experiment to find the focal length of a concave 14.
mirror, using parallax method, a student placed the
object pin at a point so as to obtain an enlarged real
image. He used an image pin in order to locate the
position of this real image of the object pin, by trying
to remove the parallax between the two. Checking for
parallax, he observed that the image of the object pin
moved through greater distance than the image pin, (
with respect to the edge of the mirror, when he moved ) ( )
his eye. The position, across the optical bench (with
respect to the present position of the image pin), of the
image (of the objectpin) is
(1) closer to his eyes (1)
(2) closer to the centre of curvature of the mirror (2)
(3) between the image pin and the centre of curva (3)
ture of the mirror
(4) at the position of the object pin (4)
15. For a prism under minimum deviation condition, con 15.
sider the following statements and choose the correct
option
(1) refracted ray becomes parallel to base of prism (1)
(2) angle of incidence is equal to angle of emergence (2)
(3) angle of deviation becomes equal to angle of prism (3)
(4) both (1 ) and (2) (4) (1) (2)
16. A small pin fixed on a table top is viewed from above from 16. 50 cm
a distance of 50 cm. The distance that pin appear to be
raised if it is viewed from the same point through a 15 cm 15 cm
thick glass slab held parallel to the table is
[Refractive index of glass = 1.5] [ = 1.5]
(1) 5 cm (1) 5 cm
(2) 10 cm (2) 10 cm
(3) 2.5 cm (3) 2.5 cm
(4) 7.5 cm (4) 7.5 cm
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