Evidence for the wave nature of light cannot be obtained from
|
(a) Reflection |
(b) Doppler effect |
(c) Interference |
(d) Diffraction |
Evidence for the wave nature of light cannot be obtained from
|
(a) Reflection |
(b) Doppler effect |
(c) Interference |
(d) Diffraction |
(a) Reflection
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A heating coil can heat the water of a vessel from 20℃ to 60℃ in 30 minutes. Two such heating coils are put in series and then used to heat the same amount of water through the same temperature range. The time taken now will be (neglecting thermal capacity of the coils)
|
(a) 60 minutes |
(b) 30 minutes
|
(c) 15 minutes |
(d) 7.5 minutes |
Tesla is the unit of
|
(a) Electric flux |
(b) Magnetic flux |
(c) Electric field |
(d) Magnetic field |
A man can see the object between 15 cm and 30 cm. He uses the lens to see the far objects. Then due to the lens used, the near point will be at
|
(a) |
(b) 30 cm |
(c) 15 cm |
(d) |
Intensity of light depends upon
|
(a) Velocity |
(b) Wavelength |
(c) Amplitude |
(d) Frequency |
The given figure shows the wave forms for two inputs A and B and that for the output Y of a logic circuit. The logic circuit is

|
(a) An AND gate |
(b) An OR gate |
(c) A NAND gate |
(d) An NOT gate |