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

Two similar galvanometers are covered into an ammeter and a milliammeter. The shunt resistance of ammeter as compared to the shunt resistance of milliammeter will be

A
Zero
B
More
C
Less
D
Equal
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