Q. Which one of the following is a source of methane emission into the atmosphere?
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Q. Period of oscillation of 3 cm microwaves in seconds is
Q. When a number of resistors are connected in series in a circuit, the value of current:
Q. Water from soil enters into the root hairs owing to
Q. Electric current in a metal wire is due to the flow of-
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Q. When two coherent waves interfere, there is
Q. Which of the following instruments measures blood pressure?
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