Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise : Electronic Devices and Circuits - Section 3
- 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
16.
In the circuit shown in figure, for different values of R, the values of V and I are given. Other elements remaining the same. when R = ∞, V = 5 volt 
- R = 0, I = 2.5 A
- R = 3 Ω, the value of V is given by
Answer: Option
Explanation:
When R = ∞, V = 5v, 
Voc = 5V circuit is open
When R = 0, I = 2.5A Isc = 2.5 circuit short circuited 
Hence the voltage across 3 Ω is 3 volt.
17.
Which statement is true for an ac circuit?
Answer: Option
Explanation:
Active and apparent power are equal for resistive circuit. Otherwise active power is less than apparent power.
18.
Three inductors each 30 mH are connected in delta. The value of inductance or each arm of equivalent star is
Answer: Option
Explanation:
19.
If the iron core of a coil is removed so that it becomes an air cored coil, its inductance
Answer: Option
Explanation:
μr for air is 1 while μr for iron is more than 1.
20.
In figure, E = 1 V (rms value). The average power is 250 mW. Then phase angle between E and I is
Answer: Option
Explanation:
EI cos θ = 0.25 or I cos θ = 0.25
From above equations cos θ = 0.707 and θ = 45°.
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