A lens has a power +2.0 D. The type of lens and its focal length will be
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What is the range of frequencies of sound waves audible to human beings?
What is the resistance (in Ω) of an electrical component if a current of 0.2 A passes through it on application of 8 V of potential difference across it?
Which of the following coloured light has the lowest frequency?
Which of the following does NOT contribute to sparkling of diamonds?
What is the heat generated (in J) in a heating element of resistance 800 Ω when a current of 0.2 A passes through it for 40 seconds?
The diameter of the reflecting surface of a spherical mirror is called a/an
Which of the following devices helps to maintain a potential difference across a conductor?
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