- AA loss of kinetic energy
- BThe destruction of the waves
- CThe reversal of the direction of the waves
- DA larger wave
Explanation:
For constructive interference,
AR = A1 + A2
Due to the constructive interference of the superimposing waves, resultant wave of larger amplitude is obtained and hence constructive interference results in the larger wave.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The photoelectric threshold wavelength for potassium (work function being 2eV ) is
|
(a) 310 nm |
(b) 620 nm |
(c) 1200 nm |
(d) 2100 nm |
Resistance as shown in figure is negative at
|
(a) A |
(b) B |
(c) C |
(d) None of these |
To observe diffraction the size of an obstacle
|
(a) Should be of the same order as wavelength |
(b) Should be much larger than the wavelength |
|
(c) Have no relation to wavelength |
(d) Should be exactly |
What determines the hardness of the X-rays obtained from the Coolige tube
|
(a) Current in the filament |
| (b) Pressure of air in the tube |
| (c) Nature of target |
| (d) Potential difference between cathode and target |
The resistor of resistance 'R' is connected to 25 V supply and heat produced in it is 25 J/sec. The value of R is
|
(a) 225 Ω |
(b) 1 Ω |
(c) 25 Ω |
(d) 50 Ω |