Physics In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is Increased by 2% Increased by 4% Decreased by 4% Decreased by 2% Increased by 2% Increased by 4% Decreased by 4% Decreased by 2% ANSWER DOWNLOAD EXAMIANS APP
Physics If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths? LUV < lIR < lVIS LUV < lVIS < lIR LUV > lVIS > lIR LUV > lIR > lVIS LUV < lIR < lVIS LUV < lVIS < lIR LUV > lVIS > lIR LUV > lIR > lVIS ANSWER DOWNLOAD EXAMIANS APP
Physics The threshold frequency is the frequency below which : Photo current is constant Photo current increases with voltage Photo current decreases with voltage Photo electric emission is not possible Photo current is constant Photo current increases with voltage Photo current decreases with voltage Photo electric emission is not possible ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following property of sound is affected by change in air temperature? Amplitude Wavelength Intensity Frequency Amplitude Wavelength Intensity Frequency ANSWER DOWNLOAD EXAMIANS APP
Physics How much mechanical work must be done to completely melt 1 gram of ice at 0°C ? 80 J 4.2 J 336 J 2268 J 80 J 4.2 J 336 J 2268 J ANSWER DOWNLOAD EXAMIANS APP
Physics Planets do not twinkle because They emit light of a constant intensity They are nearer to earth and hence we receive a greater amount of light. They are very far away from the earth resulting in decrease in intensity of light Their distance from the earth does not change with time They emit light of a constant intensity They are nearer to earth and hence we receive a greater amount of light. They are very far away from the earth resulting in decrease in intensity of light Their distance from the earth does not change with time ANSWER DOWNLOAD EXAMIANS APP
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