Exercise: Materials And Components

Questions for: Materials And Components

A parallel plate capacitor has area of plate equal to 1 m and distance between plates is also 1 m2. The lossy dielectric has a complex dielectric constant ∈r = ∈'r - j ∈"r. If the capacitor is represented by R and C is parallel, then
A:
B:
C:
D:
Answer: A
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When an electron moves at velocity v in combined electric and magnetic fields E and H, the Lorentz force F is F = - e(E + v x B).
A:
True
B:
False
C:
D:
Answer: A
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In a conductor the current flow is due to
A:
holes
B:
electrons
C:
ions
D:
electrons and ions
Answer: B
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Assertion (A): Ferrites are very useful at very high frequencies.

Reason (R): Ferrites have high permeability and high resistivity.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: A
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Assertion (A): For a dielectric, P = ∈0(∈r - 1) E.

Reason (R): Dipole moment per unit volume is called polarization of dielectric.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: B

The two statements are correct but independent of each other.

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