Two different materials, rubbed against each other acquired opposite charges when separated. This is an…
Two different materials, rubbed against each other acquired opposite charges when separated. This is an example of charging…
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The electricity meters in houses measure energy unit consumed in
The electricity meters in houses measure energy unit consumed in A. kilowatt-hour B. volt C. ampere D. coulomb…
A man and his friend have masses 70kg and 60kg respectively. If they are seated…
A man and his friend have masses 70kg and 60kg respectively. If they are seated 1.0m apart, calculate…
An astronomical telescope has objectives and eye-piece lenses of focal length 3.5m and 5cm respectively….
An astronomical telescope has objectives and eye-piece lenses of focal length 3.5m and 5cm respectively. Determine the magnifying…
An aluminium cable of diameter 4 x 10-3m and resistivity 3.0 x 10-8(omega)m has a…
An aluminium cable of diameter 4 x 10-3m and resistivity 3.0 x 10-8(omega)m has a resistance of 21(Omega).…
The diagram given illustrates the waveform of a note produced by vibrations in an air…
The diagram given illustrates the waveform of a note produced by vibrations in an air column of length…
The pair of musical instruments that works on the vibration of air in pipes is
The pair of musical instruments that works on the vibration of air in pipes is A. piano and…
Complementary colours are those which
Complementary colours are those which A. have the same refractive index B. have the same wavelength C. add-up…
Total internal reflection. i. is a phenomenon of refraction of light. ii. occurs when light…
Total internal reflection. i. is a phenomenon of refraction of light. ii. occurs when light rays travel into…
X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both…
X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both waves A. are…