Electronics and Communication Engineering - Materials and Components
Exercise : Materials and Components - Section 8
- Materials and Components - Section 1
- Materials and Components - Section 2
- Materials and Components - Section 3
- Materials and Components - Section 4
- Materials and Components - Section 5
- Materials and Components - Section 6
- Materials and Components - Section 7
- Materials and Components - Section 8
- Materials and Components - Section 9
11.
Assertion (A): If an atom of polarizability a is placed in homogeneous field E, the energy stored is 0.5 aE2.
Reason (R): Capacitance of an isolated conducting sphere R in vacuum is 4 p∈0 R farads.
12.
Which of the following are true for relative dielectric constant?
- It is dimensionless.
- It is equal to 1 for vacuum.
- It is equal to 1 for all substances.
Answer: Option
Explanation:
∈r has no units and equal to 1 for vacuum. For other substances it has different value.
13.
Schrodinger wave equation is partial differential equation.
14.
Hall effect is observed in a specimen (metal or semi- conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
15.
The capacitance of a capacitor is not affected by
Answer: Option
Explanation:
Capacitance depends on area, distance and ∈r but not on thickness of plates.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers