1
KCET 2025
MCQ (Single Correct Answer)
+1
-0

The variations of resistivity $\rho$ with absolute temperature T for three different materials $\mathrm{X}, \mathrm{Y}$ and Z are shown in the graph below. Identify the materials $\mathrm{X}, \mathrm{Y}$ and Z .

KCET 2025 Physics - Current Electricity Question 1 English
A
$X$ - copper, $Y$ - semiconductor, $Z$ - nichrome
B
$X$ - semiconductor, $Y$ - nichrome, $Z$ - copper
C
$X$ - nichrome, $Y$ - copper, $Z$ - semiconductor
D
$X$ - copper, $Y$ - nichrome, $Z$ - semiconductor
2
KCET 2025
MCQ (Single Correct Answer)
+1
-0

Given, a current carrying wire of non-uniform cross-section, which of the following is constant throughout the length of wire?

A
Drift speed
B
Current and drift sped
C
Current only
D
Current, electric field and drift speed
3
KCET 2025
MCQ (Single Correct Answer)
+1
-0

The graph between variation of resistance of a metal wire as a function of its diameter keeping other parameters like length and temperature constant is

A
KCET 2025 Physics - Current Electricity Question 6 English Option 1
B
KCET 2025 Physics - Current Electricity Question 6 English Option 2
C
KCET 2025 Physics - Current Electricity Question 6 English Option 3
D
KCET 2025 Physics - Current Electricity Question 6 English Option 4
4
KCET 2025
MCQ (Single Correct Answer)
+1
-0

Two thin long parallel wires separated by a distance ' $r$ ' from each other in vacuum carry a current of I ampere in opposite directions. Then, they will

A
Attract each other with a force per unit length of $\frac{\mu_0 I^2}{2 \pi r}$
B
Repel each other with a force per unit length of $\frac{\mu_0 I^2}{2 \pi r}$
C
Repel each other with a force per unit length of $\frac{\mu_0 I^2}{2 \pi r^2}$
D
Attract each other with a force per unit length of $\frac{\mu_0 I^2}{2 \pi r^2}$
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