Which of the following statement is correct?
A. A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator
B. A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator
C. A semiconductor is one which conducts only half of the applied voltage
D. A semiconductor is a material made of alternate layers of conducting material and insulator
Answer: Option A
This Question Belongs to Electrical Engineering >> Current Electricity
Resistance of a material always decreases if
A. Temperature of material is decreased
B. Temperature of material is increased
C. Number of free electrons available becomes more
D. None of the above is correct
The minimum charge on an ion is
A. Equal to the atomic number of the atom
B. Equal to the charge of an electron
C. Equal to the charge of the number of electrons in an atom
D. Zero
Current velocity through a copper conductor is
A. the same as propagation velocity of electric energy
B. independent of current strength
C. of the order of a few micro m/s
D. nearly 3 x 108 m/s
Join The Discussion