Ans 1: (Master Answer)
A
For the identical bulbs , the brightness of the bulbs depend upon the current flowing through them or the potential difference across them.
In the given circuit when the switch S is closed , due to parallel combination of bulbs B and C net resistance of the circuit decreases and hence the current through bulb A increases.While the current is divided between bulbs B and C .
Therefore the brightness of bulb A increases , B decreases and bulb C starts glowing.
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Renu classified plants into groups as shown in the table shown here. Which of the following is the most appropriate headings for group X and group Y?
X | Y | |
---|---|---|
A | Aquatic plants | Parallel |
B | Heterotrophs | Autotrophs |
C | Non-flowering plants | Flowering plants |
D | Parasitic plants | Insectivorous plants |
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Ans 2:
Ans 4:
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Read the given statements and state (T) for true and (F) for false ones.
I. Chalk powder mixed in wheat flour can be separated by sieving.
II. The solubility of a solute at a particular temperature cannot be increased by stirring.
III. The process of pouring out the clear upper liquid without disturbing the sediment is called sedimentation.
IV. Muddy water can be cleared faster using the method of loading.
V. Separating funnel is used to separate two miscible liquids.
I | II | III | IV | V | |
---|---|---|---|---|---|
A | (F) | (T) | (T) | (F) | (F) |
B | (T) | (T) | (F) | (T) | (F) |
C | (F) | (T) | (F) | (T) | (F) |
D | (F) | (T) | (F) | (F) | (T) |
This is wrong. The internet says that wheat flour can be separated from chalk powder by sieving. So answer will be B
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Study the given flow chart carefully and select the option which correctly identifies P, Q, R, S and T.
P | Q | R | S | T | |
A | Sun | Star | Jupiter | Mercury | Mars |
B | Moon | Moon | Saturn | Venus | Mars |
C | Sun | Moon | Uranus | Mercury | Earth |
D | Moon | Star | Neptune | Mars | Earth |