Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise : Electronic Devices and Circuits - Section 4
- Electronic Devices and Circuits - Section 14
- Electronic Devices and Circuits - Section 27
- Electronic Devices and Circuits - Section 26
- Electronic Devices and Circuits - Section 25
- Electronic Devices and Circuits - Section 24
- Electronic Devices and Circuits - Section 23
- Electronic Devices and Circuits - Section 22
- Electronic Devices and Circuits - Section 21
- Electronic Devices and Circuits - Section 20
- Electronic Devices and Circuits - Section 19
- Electronic Devices and Circuits - Section 18
- Electronic Devices and Circuits - Section 17
- Electronic Devices and Circuits - Section 16
- Electronic Devices and Circuits - Section 15
- Electronic Devices and Circuits - Section 1
- Electronic Devices and Circuits - Section 13
- Electronic Devices and Circuits - Section 12
- Electronic Devices and Circuits - Section 11
- Electronic Devices and Circuits - Section 10
- Electronic Devices and Circuits - Section 9
- Electronic Devices and Circuits - Section 8
- Electronic Devices and Circuits - Section 7
- Electronic Devices and Circuits - Section 6
- Electronic Devices and Circuits - Section 5
- Electronic Devices and Circuits - Section 4
- Electronic Devices and Circuits - Section 3
- Electronic Devices and Circuits - Section 2
31.
For a network having 1 Ω resistor and 1 F capacitor in series Z(s) =
1 + s
Answer: Option
Explanation:
32.
In given figure the switch was closed for a long time before opening at t = 0. The voltage Vx at t = 0+ is
Answer: Option
Explanation:
at t = 0, L will act as short circuit hence I = 2.5 A. Vx = 2.5 x 20 
50v, but in opposite to current source. Hence Vx = - 50v.
33.
The ac bridge shown in the figure is balanced if 
and Z4 is equal to
and Z4 is equal to
Answer: Option
Explanation:
= 375 ∠ - 40 - 30.
34.
S is open for a long time and steady state is reached S is closed at t = 0. Let iL the current in the inductor At t = 0+, 
is given by
is given byAnswer: Option
Explanation:
If S is open, for long time then C will be short circuited,
voltage across 2Ω resistor = 2 volt (V0)
35.
In an air cored coil, a current of 0.7 A causes a flux of 5 x 10-6 Wb. If the core is made of cast iron and the coil is similar, the same current can set up a flux of about
Answer: Option
Explanation:
The permeability of cast iron is about 100.
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