Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise : Electronic Devices and Circuits - Section 5
- 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
41.
In figure the total inductance of the circuit is


Answer: Option
Explanation:
Inductances are in series aiding connection. M terms will become twice because of mutual inductance between L1 and L2 and that between L2 and L1.
42.
In the network of figure, the voltage drops across R1, R2, R3 are 6 V, 8 V and 12 V with polarities as shown. The value of R3 is


Answer: Option
Explanation:
From the given data the current through R1 is 4 A.
43.
Assertion (A): Millman's theorem helps in replacing a number of current sources in parallel by a single current source.
Reason (R): Maximum power transfer theorem is applicable only for dc, circuits.
Answer: Option
Explanation:
Maximum power transfer theorem is applicable to ac circuits.
44.
Double integration of unit step function leads to
Answer: Option
Explanation:
Integral of unit step function is ramp and integral of ramp is doublet.
45.
A conductor has a cylindrical shape with a diameter d. Its resistance is 2 Ω. It is recast into a cylindrical conductor of diameter 0.3d. The resistance of new conductor is likely to be
Answer: Option
Explanation:
Since new diameter is 0.3 d, the new area of cross-section a (0.3 d)2.
The volume remains the same. Therefore length increase by a factor .
Hence .
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