Antiferromagnetic materials do not have permanent dipoles. True False Anti-ferro

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Question
Antiferromagnetic materials do not have permanent dipoles.
Options
A. True
B. False

Correct Answer

False

Explanation

Anti-ferromagnetic materials have permanent dispoles but antiparallel orientation of equal moments.

Materials and Components problems

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3. Assertion (A): In a conductor, current density remains constant in time as long as E is constant.
Reason (R): In a conductor, J = ?E.
Options
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

5. An air cored inductance is a
Options
A. linear circuit element because its reactance varies linearly with voltage at a fixed frequency
B. linear circuit element because its current varies linearly with voltage at a fixed frequency
C. nonlinear circuit element due to saturation of core
D. nonlinear circuit element because v =

6. Silicon and germanium are elements in the
Options
A. second column of periodic table
B. third column of periodic table
C. fourth column of periodic table
D. fifth column of periodic table

8. A capacitor can be represented by a capacitance and resistance in parallel. For a good capacitor, this parallel resistance should be
Options
A. negligible
B. low
C. high
D. very high

9. When a potential is applied across an intrinsic semiconductor, holes flow
Options
A. towards positive terminal
B. away from positive terminal
C. in the external circuit only
D. none of the above

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