Physics Shaving mirror is Concave Parabolic Plane Convex Concave Parabolic Plane Convex ANSWER DOWNLOAD EXAMIANS APP
Physics In a Laser (say neon laser) all the atoms emit the light waves of Same frequency Same phase Same amplitude All of these Same frequency Same phase Same amplitude All of these ANSWER DOWNLOAD EXAMIANS APP
Physics Positive feedback is used in None of these Rectifiers Amplifiers Oscillators None of these Rectifiers Amplifiers Oscillators ANSWER DOWNLOAD EXAMIANS APP
Physics A decibel is A musical note A measure of sound level A musical instrument The wavelength of noise A musical note A measure of sound level A musical instrument The wavelength of noise 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 > lVIS > lIR LUV < lVIS < lIR LUV < lIR < lVIS LUV > lIR > lVIS LUV > lVIS > lIR LUV < lVIS < lIR LUV < lIR < lVIS LUV > lIR > lVIS ANSWER DOWNLOAD EXAMIANS APP
Physics Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 3R/4 2R 5R/4 R/2 3R/4 2R 5R/4 R/2 ANSWER DOWNLOAD EXAMIANS APP
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