PHYSICS
SINGLE CORRECT MCQ
Statement I: If the temperature of a semiconductor is increased then it's resistance decreases.
Statement II: The energy gap between conduction band and valence band is very small.
Text Solution
Verified by ExpertsThe correct answer is:
A
PHYSICS
SINGLE CORRECT MCQ
In semiconductors the energy gap between conduction band and valence band is small ( 
). Due to temperature rise, electron in the valence band gain thermal energy and may jumpy across the small energy gap, (to the conduction band). Thus conductivity increases and hence resistance decreases.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The energy equivalent of 0.5 g of a substance is:
A wheel of radius 0.4 m can rotate freely about its axis as shown in the figure. A string is wrappe…
If the ratio of lengths, radii and Young's modulus of steel and brass wires shown in the figure are…
A magnetic needle suspended parallel to a magnetic field requires of work to turn it through . Th…
The magnetic induction at the center O in the figure shown is
The energy stored in the capacitor as shown in the figure