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Q. What causes changes in the colours of the soap or oil films for the given beam of light?
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Q. Determine the time-period (in ms) of a sinusoidal wave when the frequency of the wave is 60 Hz. ?
Q. Pure water is bad conductor of electricity because it is-
Q. Which one of the following statements is not correct?
Q. Friction is caused by the ________ on the two surfaces in contact.
Q. The transformers is not used in the D.C line because
Q. Ventilators are provided near the ceiling of the room because
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