Conduction Current MCQs : This section focuses on the "Conduction Current". These Multiple Choice Questions (MCQs) should be practiced to improve the Conduction Current skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Calculate the displacement current density when the electric flux density is 20sin 0.5t.
A. 10sin 0.5t
B. 10cos 0.5t
C. 20sin 2t
D. 20cos 2t
Question 2
Calculate the frequency at which the conduction and displacement currents become equal with unity conductivity in a material of permittivity 2.
A. 18 GHz
B. 9 GHz
C. 36 GHz
D. 24 GHz
Question 3
Find the conductivity of a material with conduction current density 100 units and electric field of 4 units.
A. 25
B. 400
C. 0.04
D. 1600
Question 4
Find the magnitude of the displacement current density in air at a frequency of 18GHz in frequency domain. Take electric field E as 4 units.
A. 18
B. 72
C. 36
D. 4
Question 5
If the intrinsic angle is 20, then find the loss tangent.
A. tan 20
B. tan 40
C. tan 60
D. tan 80
Question 6
If the loss tangent is very less, then the material will be a
A. Conductor
B. Lossless dielectric
C. Lossy dielectric
D. Insulator
Question 7
In free space, which of the following will be zero?
A. Permittivity
B. Permeability
C. Conductivity
D. Resistivity
Question 8
In good conductors, the electric and magnetic fields will be
A. 45 in phase
B. 45 out of phase
C. 90 in phase
D. 90 out of phase
Question 9
The intrinsic impedance of free space is given by
A. 272 ohm
B. 412 ohm
C. 740 ohm
D. 377 ohm
Question 10
The ratio of conduction to displacement current density is referred to as
A. Attenuation constant
B. Propagation constant
C. Loss tangent
D. Dielectric constant