Germanium (Ge) is a metalloid that can behave as a semiconductor when used in electronic devices. It has properties that allow it to conduct electricity under certain conditions, making it suitable for use in semiconductor applications. Copper (A), silver (B), and aluminium (C) are not typically used as semiconductors.
So, the correct answer is option (D): Germanium.
Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance \( R_p = 1 \, \Omega \) as shown in the figure. An external resistance of \( R_e = 2 \, \Omega \) is connected via the sliding contact.
The current \( i \) is :
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.