Question
A plane electromagnetic wave travels in vacuum along the
z-direction. If the frequency of the wave is 20 MHz, what is its wavelength?Solution
The rate of transpiration accelerates due to
Which of the following is NOT a method to improve crop yields in India?
Necessary element of change in solar energy to electric energy –
Which of the following statement is/are true?
I. Acids are sour in taste
II. Bases are bitter in taste
A battery of emf 12 V and internal resistance 4 ohm is connected to a resistor. If the current in the circuit is 0.6 A, what is the resistance of the re...
The device used for locating submerged objects under sea is –
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjace...
Which type of glass is used for making chemical apparatus like beakers, flasks etc.?
Which of the following is a common risk factor for heart disease?
How many moles of carbon dioxide are present in a gas jar containing 1.501 × 1022 molecules of CO₂?
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