In a triode amplifier, 
kilo ohm and load resistance 
kilo ohm. If the input signal voltage is 0.5 volt, then output signal voltage will be
|
(a) 1.25 volt |
(b) 5 volt |
(c) 2.5 volt |
(d) 10 volt |
(c) 2.5 volt
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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 |
Orbital acceleration of electron is
|
(a) |
(b) |
(c) |
(d) |
An electric field of 1500 V / m and a magnetic field of 0.40 weber / meter2 act on a moving electron. The minimum uniform speed along a straight line the electron could have is
|
(a) 1.6 × 1015 m / s |
(b) 6 × 10-16 m / s |
(c) 3.75 × 103 m / s |
(d) 3.75 × 102 m / s |
The number of revolutions per second made by an electron in the first Bohr orbit of hydrogen atom is of the order of 3
|
(a) |
(b) |
(c) |
(d) |
A 60 watt bulb is hung over the center of a table 4 m × 4 m at a height of 3 m. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is
|
(a) |
(b) 2 / 1 |
(c) 17 / 13 |
(d) 5 / 4 |
A capacitor of capacity 
is charged upto V volt and then connected to an uncharged capacitor of capacity 
. Then final potential difference across each will be
|
(a) |
(b) |
(c) |
(d) |
In frequency modulation
|
(a) The amplitude of modulated wave varies as frequency of carrier wave |
|
(b) The frequency of modulated wave varies as amplitude of modulating wave |
|
(c) The amplitude of modulated wave varies as amplitude of carrier wave |
|
(d) The frequency of modulated wave varies as frequency of modulating wave |
