1
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
2
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
3
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 $\frac{\mu_0 I^2}{2 \pi r^2}$
4
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A solenoid is 1 m long and 4 cm in diameter. It has five layers of windings of 1000 turns each and carries a current of 7A. The magnetic field at the centre of the solenoid is

A
$0.4396 \times 10^{-5} \mathrm{~T}$
B
$4.396 \times 10^{-2} \mathrm{~T}$
C
$43.96 \times 10^{-2} \mathrm{~T}$
D
439.6 T
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