Which of the following statements are correct?
A. Two major types of resistors are wire bound resistors and carbon resistors.
B. Mobility is the drift velocity per unit electric field.
C. The internal resistance of dry cells is much lower than the common electrolytic cells.
D. In electrolytic liquids, electrons carry the electric current.
E. Potentiometer is unaffected by the internal resistance of the source.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
Carbon resistors have low temperature coefficient value. Wire wound resistors have a high temperature coefficient value.
The magnitude of drift velocity per unit electric field is mobility (m)
The internal resistance of dry cells is generally higher than the common electrolytic cells.
in case of electrolyte there are no electrons. The electric current is basically due to flow of ions.
The potentiometer has the advantage that it draws no current from be voltage source being measured. As such it is unaffected by the internal resistance of the source.