Zener diode is used as
|
(a) Half wave rectifier |
(b) Full wave rectifier |
|
(c) ac voltage stabilizer |
(d) dc voltage stabilizer |
Zener diode is used as
|
(a) Half wave rectifier |
(b) Full wave rectifier |
|
(c) ac voltage stabilizer |
(d) dc voltage stabilizer |
(c) ac voltage stabilizer
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What happens to the fringe pattern when the Young’s double slit experiment is performed in water instead or air then fringe width
|
(a) Shrinks |
(b) Disappear |
(c) Unchanged |
(d) Enlarged |
The production of e.m.f. by maintaining a difference of temperature between the two junctions of two different metals is known as
|
(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
The de-Broglie wavelength of an electron in the first Bohr orbit is
|
(a) Equal to one fourth the circumference of the first orbit |
|
(b) Equal to half the circumference of the first orbit |
|
(c) Equal to twice the circumference of the first orbit |
|
(d) Equal to the circumference of the first orbit |
Dark lines on solar spectrum are due to
|
(a) Lack of certain elements |
|
(b) Black body radiation |
|
(c) Absorption of certain wavelengths by outer layers |
|
(d) Scattering |
Two coherent light sources S1 and S2 (l= 6000 Å) are 1mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be
|
(a) 0.015 cm |
(b) 0.025 cm |
(c) 0.010 cm |
(d) 0.030 cm |
To get an output 1 from the circuit shown in the figure, the input must be
|
(a) A = 0, B = 1, C = 0 |
(b) A = 1, B = 0, C = 0 |
(c) A = 1, B = 0, C = 1 |
(d) A = 1, B = 1, C = 0 |
When light travels from one medium to the other of which the refractive index is different, then which of the following will change
|
(a) Frequency, wavelength and velocity |
(b) Frequency and wavelength |
|
(c) Frequency and velocity |
(d) Wavelength and velocity |