Physics A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________ 50 J 20 J 30 J 40 J 50 J 20 J 30 J 40 J ANSWER DOWNLOAD EXAMIANS APP
Physics A needle or a pin floats on the surface of water because of Surface energy Viscosity Adhesive force Surface tension Surface energy Viscosity Adhesive force Surface tension ANSWER DOWNLOAD EXAMIANS APP
Physics Why the needle of iron swims on water surface when it is kept gently ? Due to its shape Due to surface tension It will remain under the water, when it will displace more water than its weight The density of needle is less than that of water Due to its shape Due to surface tension It will remain under the water, when it will displace more water than its weight The density of needle is less than that of water ANSWER DOWNLOAD EXAMIANS APP
Physics An optically plane surface reflects a beam of light As a parallel beam in one direction As parallel beams in all directions As a diffused beam in one direction As diffused beams in all directions As a parallel beam in one direction As parallel beams in all directions As a diffused beam in one direction As diffused beams in all directions ANSWER DOWNLOAD EXAMIANS APP
Physics When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as Echo Beats Resonance Doppler effect Echo Beats Resonance Doppler effect ANSWER DOWNLOAD EXAMIANS APP
Physics To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor Should be made of a good conductor like copper with sharp-pointed edges Should be in the form of a vertical rod Should be made of a good conductor but can be of any shape Can be of any shape Should be made of a good conductor like copper with sharp-pointed edges Should be in the form of a vertical rod Should be made of a good conductor but can be of any shape Can be of any shape ANSWER DOWNLOAD EXAMIANS APP
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