- 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


Materials and Components - Engineering
Q1: Assertion (A): At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm2 of surface. Reason (R): Thermionic emission current is given by Ith = SA0 T2 e-Ew/kT.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
ANS:A - Both A and R are true and R is correct explanation of A If different values are substituted in the equation for Ith the value of emission current comes out to be about 0.1 A/cm2. |


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