A transistor is used in common emitter mode as an amplifier. Then
|
(a) The base-emitter junction is forward biased |
|
(b) The base-emitter junction is reverse biased |
|
(c) The input signal is connected in series with the voltage applied to the base-emitter junction |
|
(d) a, c |
(d) a, c
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When two identical capacitors are in series have 3mF capacitance and when parallel 12mF. What is the capacitance of each
|
(a) 6 μF |
(b) 3 μF |
(c) 12 μF |
(d) 9 μF |
If an insulated non-conducting sphere of radius R has charge density ρ. The electric field at a distance r from the centre of sphere (r < R) will be
|
(a) |
(b) |
(c) |
(d) |
A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m. The power of the lens is
|
(a) + 10 dioptres |
(b) – 10 dioptres |
(c) – 5 dioptres |
(d) +5 dioptres |
In a diode AM-detector, the output circuit consist of R = 1kW and C = 10 pF. A carrier signal of 100 kHz is to be detected. Is it good
|
(a) Yes |
(b) No |
|
(c) Information is not sufficient |
(d) None of these |
