Question

Arrange the following phenomena in the order they occur to create drift current: 
A. An electric field is applied 
B. Free carriers exist 
C. Carriers accelerate and scatter 
D. Net drift current is established

• A. B, A, C, D
• B. B, A, D, C
• C. A, B, C, D
• D. A, B, D, C

Hint:

Carriers → Field → Motion → Current.

Answer 1

The Correct Option is A

Concept: Drift current occurs when charge carriers move under an electric field.

Step 1: Free carriers exist Without carriers, current cannot flow. \[ \Rightarrow B \]

Step 2: Apply electric field This provides force on carriers. \[ \Rightarrow A \]

Step 3: Carrier motion Carriers accelerate and collide → drift velocity develops. \[ \Rightarrow C \]

Step 4: Current established Net motion results in drift current. \[ \Rightarrow D \] \[ \therefore B \rightarrow A \rightarrow C \rightarrow D \]