Assertion (A): An amorphous material is obtained when mobility of atoms is inhib

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Question
Assertion (A): An amorphous material is obtained when mobility of atoms is inhibited during solidification.
Reason (R): Crystalline state is a natural state for most solids.
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

Correct Answer

Both A and R are true but R is not correct explanation of A

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Options
A. 2
B. 3
C. 4
D. 5

4. The number of turns in a coil is doubled. If initial time constant is T, the new time constant is
Options
A. T
B. 2T
C. 4T
D.

5. When temperature is above ferromagnetic Curie temperature, a ferromagnetic material
Options
A. becomes a paramagnetic material
B. becomes a very strong ferromagnetic material
C. becomes diamagnetic material
D. none of the above

6. 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 =

8. 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

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