PHYSICS CH5 Magnetism and Electromagnetism — Science STD 9 — Question

Assertion (A) : The moist skin in earthworm helps in oxygenation of blood.
Reason (R) : The slippery skin of earthworm is kept moist.

Assertion : The production of food from animal sources has increased greatly in the last few decades.
Reason : Operation flood and blue revolution production has increased in recent years.

Assertion (A): Distance between two celestial bodies is measured in terms of light year.
Reason (R): The distance travelled by the light in one year is one light year.

Assertion : Foreign dairy breeds are preferred over local breeds.
Reason: The foreign breeds have shorter lactation periods

Assertion (A): When 2 long parallel wires, hanging freely are connected in parallel to a battery, they come closer to each other.
Reason (R): Wires carrying current in opposite direction repel each other.

Assertion: Pascal’s law is the working principle of a hydraulic lift
Reason: Pressure is thrust per unit area.

Assertion (A) : The number of carbon compounds alone is more than the number of compounds of all the elements taken together.
Reason (R) : Carbon has some unique properties such as
1) Catenation, 2) Tetravalency, 3) Multiple bonds, 4) Allotropy, 5) Isomerism.

Assertion: Maximum sunlight reaches earth’s surface during the noon time.
Reason: Heat from the sun reaches earth’s surface by radiation.

Assertion: A positive acceleration of a body can be associated with slowing down of the body.
Reason: Acceleration is a vector.
(a) If both assertion & reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion & reason are true but the reason is not correct explanation of the assertion.
(c) If the assertion is true but the reason is false.
(d) If assertion & reason both are false.
(e) If assertion is false but reason is true.