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Conversion of milk to curd improves its nutritional value by increasing the amount of
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The similarity of bone structure in the forelimbs of many vertebrates is an example of
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Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
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The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is
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The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
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At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earths atmosphere?
(Given : Mass of oxygen molecule (m) = 2.76 × 10^{-26}kg
Boltzmanns constant $k_{B} = 1.38 × 10^{-23} JK^{-1})$
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The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
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A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
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A set of n equal resistors, of value R each, are connected in series to a battery of emf E and internal resistance R. The current drawn is I. Now, the n resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10 I. The value of n is
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A battery consists of a variable number n of identical cells (having internal resistance r each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n?
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