Science
Pliysics
Test paper
Q1 Assertion (A): The metals and alloys are good conductors of electricity.
Reason (R):Bronze is an alloy of copper and tin and it is not a good conductor of
electricity.
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion
(A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true
92 Awire has a resistance of 16 0. It is melted and drawn into a wire of half its
original length. Calculate the resistance of the new wire. What is the percentage
change in itsresistance?
Q3The image of an object formed by a mirror is real, inverted and is of magnification
Y.fthe image is at a distancc of 40 cn from thc mirror, whcrc is the objcct placed?
Where woud the image be if the object is moved 20 çm towards the mirror? State
reason and also draw ray diagram for the new position of the object to justify your
ainswer.
gA Anarrow PQof white light is passing through a glass prism ABC as shown in the
diagram. Trace it on your answer sheet and show the path of the emergent beam as
observed on the screen DE.
p
B
(ó Write the name and cause of the phenomenon observed.
Whereelse in nature is this phenomenon observed?
ih Based on this observation, state the conclusion which can be drawn about the
constituents of white light.
A
myopic porson having far point 30 cm uscs spoctactos of powCr 1.0 D. How
farcan he see clearly ?
g6A52-year-old near-sighted person wears eye glass of power of -5.5D for
distancc vicwing. His
doctor prescribes a correction of +1.5D in the near-vision section of his bi-focals this
measured
rolativc to thc main parts of the lcns
yWhat is the focal length of his distance viewing part of the lens.
( What is the focal length of the near vision section of the lens.
Pliysics
Test paper
Q1 Assertion (A): The metals and alloys are good conductors of electricity.
Reason (R):Bronze is an alloy of copper and tin and it is not a good conductor of
electricity.
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion
(A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true
92 Awire has a resistance of 16 0. It is melted and drawn into a wire of half its
original length. Calculate the resistance of the new wire. What is the percentage
change in itsresistance?
Q3The image of an object formed by a mirror is real, inverted and is of magnification
Y.fthe image is at a distancc of 40 cn from thc mirror, whcrc is the objcct placed?
Where woud the image be if the object is moved 20 çm towards the mirror? State
reason and also draw ray diagram for the new position of the object to justify your
ainswer.
gA Anarrow PQof white light is passing through a glass prism ABC as shown in the
diagram. Trace it on your answer sheet and show the path of the emergent beam as
observed on the screen DE.
p
B
(ó Write the name and cause of the phenomenon observed.
Whereelse in nature is this phenomenon observed?
ih Based on this observation, state the conclusion which can be drawn about the
constituents of white light.
A
myopic porson having far point 30 cm uscs spoctactos of powCr 1.0 D. How
farcan he see clearly ?
g6A52-year-old near-sighted person wears eye glass of power of -5.5D for
distancc vicwing. His
doctor prescribes a correction of +1.5D in the near-vision section of his bi-focals this
measured
rolativc to thc main parts of the lcns
yWhat is the focal length of his distance viewing part of the lens.
( What is the focal length of the near vision section of the lens.
