Q.1
For a hole which of the following statements is incorrect ?
Q.2
Substances whose specific resistance abruptly decreases at very low temperature are called
Q.3
The impurity atoms is semiconductors
Q.4
The value of critical field below the transition temperature will
Q.5
Non-linear resistors
Q.6
The metal having the lowest temperature coefficient of resistance is
Q.7
A perfect conductor has
Q.8
The photo-electric effect occurs only when the incident light has more than a certain critical
Q.9
Carbon rods are used in wet and dry cells because
Q.10
Is viscoelastic.
Q.11
Which of the following factors affect resistivity of metals ?
Q.12
For a particular material the Hall coefficient was found to be zero. The material is
Q.13
A highly conductive material must have
Q.14
__________ is the main constituent of glass
Q.15
In a superconductor the value of critical density depends upon
Q.16
Total number of crystal systems is
Q.17
Superconductors are becoming popular for use in
Q.18
In graphite, bonding is
Q.19
The conductors have transport phenomena of electrons due to
Q.20
Is a negatively charged particle present in an atom.
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