Which of the following instruments is used to measure electric current?
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Knife is an example for
Which of the following does NOT contribute to sparkling of diamonds?
The sensation of sound persists in the human brain for about:
Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s.
During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.
What does the symbol R in electricity stand for ?
In a concave mirror when the object is placed at infinity which of the following applies to the image?