A) Current, electric field and drift speed
B) Drift speed only
C) Current and drift speed
D) Current only
Correct Answer: D
Solution :
If E is the electric field, then current density \[j=\sigma E\] Also we know that current density \[j=\frac{i}{A}\] Hence j is different for different area of cross- sections. Wheny is different, then E is also different. Thus E is not constant. The drift velocity \[{{v}_{d}}\]is given by\[{{v}_{d}}=\frac{j}{ne}=\]different for different\[j\] values. Hence only current\[i\] will be constant.
You need to login to perform this action.
You will be redirected in
3 sec
