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Q. What is the effective resistance (in Ω) of two resistors 21 Ω and 28 Ω connected in parallel?
Q. The earth’s magnetic field always has a vertical component except at the
Q. Which of the following is not emitted by radio active substance?
Q. If the length of a simple pendulum is halved then its period of oscillation is
Q. Which phase change is an example of an exothermic process?
Q. Persistence of vision is the Principle behind:
Q. What does AC and DC stand for in the electrical field?
Q. Clear sky is blue in colour, why?
Q. A single fixed pulley is used to draw water from a well because
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