Physics Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly Reflect back the heat given by earth Absorb heat from the atmosphere send it towards earth Produce heat and radiate it toward earth Prevent cold waves from the sky descending on earth Reflect back the heat given by earth Absorb heat from the atmosphere send it towards earth Produce heat and radiate it toward earth Prevent cold waves from the sky descending on earth ANSWER DOWNLOAD EXAMIANS APP
Physics The quality or tone of a musical sound produced by a stringed instrument depends on Amplitude of vibration Frequency of vibration Wave form of the sound Length of the strings in the instrument Amplitude of vibration Frequency of vibration Wave form of the sound Length of the strings in the instrument ANSWER DOWNLOAD EXAMIANS APP
Physics A vacuum cleaner works on the principle of pressure difference. On the moon it will Work with increased efficiency Work as efficiently as on the earth Not work at all Work with reduced efficiency Work with increased efficiency Work as efficiently as on the earth Not work at all Work with reduced efficiency ANSWER DOWNLOAD EXAMIANS APP
Physics Planets do not twinkle because 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 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 ANSWER DOWNLOAD EXAMIANS APP
Physics Safety fuse wire used in domestic electrical appliances is made of metal of low Specific gravity Conductance Melting point Resistance Specific gravity Conductance Melting point Resistance ANSWER DOWNLOAD EXAMIANS APP
Physics What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel? 12 36 50 24 12 36 50 24 ANSWER DOWNLOAD EXAMIANS APP
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