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Read the following passage and select the option which correctly fill blanks (i), (ii), (iii) and (iv).

(i) is the point of origin of an earthquake. (ii) measures the strength of an earthquake by estimating the amount of energy released at the focus. The point vertically above the origin point on the surface of the Earth, is (iii) . Seismic waves are detected, recorded and measured by (iv) .

If air and cloud were good conductor of electricity then

A A lightning could occur with high intensity
B Lightning could occur with lower intensity
C Lightning could not occur at all
D None of these

Rohan wanted to test the strength of four magnets. He used each magnet to attract a paperclip from a distance. For each magnet, he increased the distance between the magnet and the paperclip until the magnet could no longer attract the paperclip. He then recorded his findings in a table.


Arrange the magnets from the strongest to the weakest.

A(i), (iii), (ii), (iv)
B(iii), (i), (ii), (iv)
C(ii), (iv), (i), (iii)
D(iv), (ii), (i), (iii)

Which of the following statements are incorrect?
(i) Every periodic motion is an oscillatory motion.
(ii) Motion of strings of a guitar shows oscillatory as well as vibratory motion.
(iii) In circular motion, the acceleration of the particle is zero.
(iv) Inertia is the property of a body by virtue of which it resists any change in its state of rest or of motion.
(v) Aluminium foils can never be used as connecting wires whatever the circuit is.

A (ii), (iii) and (v) only
B (i), (ii) and (iii) only
C (ii) and (iv) only
D (i), (iii) and (v) only

Ritu took two bimetallic strips, I and II (of equal size, length and breadth) made up of metals P and Q; and Q and R, respectively as shown in the figure. She subjected each bimetallic strip to heating for the same time period. The given diagram shows her experiment.

Which of the following can be inferred from the given experiment?

AMetal Q expands more as compared to metals P and R on heating for the same time period.
BMetal R contracts more as compared to metals P and Q on heating for the same time period.
CThe order of expansion of these metals when subjected to heating is R < Q < P.
DBoth B and C

The given diagram shows a destarched, variegated leaf, partly covered by black paper. The plant is placed in bright light for several hours.

Four discs are then cut from the leaf in the positions shown and are tested for starch. Which discs do/does not contain starch?

A 1, 3 and 4 only
B 1 and 2 only
C 2 only
D 3 and 4 only

X is a force that slows down a moving object and finally stops its motion. X is the force that also

AActs at a distance and pulls down object towards Earth
BProduces fire by striking a matchstick
CCauses fall of ripe fruits on the ground
DActs only when the object is at rest.

In which of these birds, the given kind of foot is NOT present?


ASwan
BPenguin
CEagle
DDuck

Distance - time graph of an object is shown in the figure. Object moves with constant speed in a time interval from


At₃ to t₄
Bt₂ to t₃
Ct₁ to t₂
Dt₀ to t₁