1
KCET 2017
MCQ (Single Correct Answer)
+1
-0
A magnetic dipole of magnetic moment $6 \times 10^{-2}$ A-m ${ }^2$ and moment of inertia $12 \times 10^{-6} \mathrm{~kg}-\mathrm{m}^2$ performs oscillations in a magnetic field of $2 \times 10^{-2} \mathrm{~T}$. The time taken by the dipole to complete 20 oscillations is ( $\pi \approx 3$ )
A
18 s
B
6 s
C
36 s
D
12 s
2
KCET 2017
MCQ (Single Correct Answer)
+1
-0

A straight wire of length 50 cm carrying a current of 2.5 A is suspended in mid-air by a uniform magnetic field of 0.5 T (as shown in figure). The mass of the wire is ( $g=10 \mathrm{~ms}^{-2}$ )

KCET 2017 Physics - Moving Charges and Magnetism Question 6 English
A
250 gm
B
125 gm
C
62.5 gm
D
100 gm
3
KCET 2017
MCQ (Single Correct Answer)
+1
-0
The magnetic field at the centre of a current carrying loop of radius 0.1 m is $5 \sqrt{5}$ times that at a point along its axis. The distance of this point from the centre of the loop is
A
0.1 m
B
0.2 m
C
0.05 m
D
0.25 m
KCET Subjects
EXAM MAP