A. Compounds of silver
B. Liquid metals
C. Metallic alloys
D. Electrolytes
Related Mcqs:
- Which of the following materials has a negative temperature co-efficient of resistance?
A. Copper
B. Aluminum
C. Carbon
D. Brass - Which one of the following does not have negative temperature co-efficient ____________?
A. Aluminium
B. Paper
C. Rubber
D. Mica - Which of the following material has nearly zero temperature co-efficient of resistance_________?
A. Manganin
B. Porcelain
C. Carbon
D. Copper - With rise in temperature the resistance of pure metals______________?
A. increases
B. decreases
C. first increases and then decreases
D. remains constant - With rise in temperature the resistance of semi-conductors_________________?
A. decreases
B. increases
C. first increases and then decreases
D. remains constant - The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?
A. zero
B. negative
C. positive
D. about 2 ohms per degree - When electric current passes through a metallic conductor, its temperature rises. This is due to__________?
A. collisions between conduction electrons and atoms
B. the release of conduction electrons from parent atoms
C. mutual collisions between metal atoms
D. mutual collisions between conducting electrons - Temperature co-efficient of resistance is expressed in terms of___________?
A. ohms/°C
B. mhos/ohm°C
C. ohms/ohm°C
D. mhos/°C - Which of the following statement is true both for a series and a parallel D. C. circuit?
A. Elements have individual currents
B. Currents are additive
C. Voltages are additive
D. Power are additive - Which of the following statement is correct_______________?
A. A semi-conductor is a material whose conductivity is same as between that of a conductor and an insulator
B. A semi-conductor is a material which has conductivity having average value of conductivity of metal and insulator
C. A semi-conductor is one which con¬ducts only half of the applied voltage
D. A semi-conductor is a material made of alternate layers of conducting material and insulator
