1
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
Copper behaves as a
A
conductor always.
B
conductor or dielectric depending on the applied electric field strength.
C
conductor or dielectric depending on the frequency.
D
conductor or dielectric depending on the electric current density.
2
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The intrinsic impedance of a lossy dielectric medium is given by
A
$${{j\omega \mu } \over \sigma }$$
B
$${{j\omega \in } \over \mu }$$
C
$$\sqrt {{{j\omega \mu } \over {\sigma + j\omega \in }}} $$
D
$$\sqrt {{\mu \over \in }} $$
3
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The probability that an electron in a metal occupies the Fermi-level at any temperature (> 0 K)
A
$$0$$
B
1
C
0.5
D
1.0
4
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The depletion capacitance, CJ, of an abrupt P-N junction with constant doping on either side varies with reverse bias, VR , as
A
CJ $$\propto$$ VR
B
CJ $$\propto$$ VR-1
C
CJ $$\propto$$ VR-1/2
D
CJ $$\propto$$ VR-1/3
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