1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
The number of electrons moving per second through the filament of a lamp of $60$ W operating at $120$ V is nearly $(e = 1.6 \times 10^{-19}\text{ C})$ _____________.
A
$6.2 \times 10^{18}$
B
$6.2 \times 10^{19}$
C
$3.1 \times 10^{18}$
D
$3.1 \times 10^{19}$
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Pick out the WRONG statements about magnetic substances.
($\chi$ = magnetic susceptibility)
($\mu_r$ = relative permeability).
I. Substances with $-1 \leq \chi < 0$ are diamagnetic.
II. Substances with $\chi \gg 1$ are paramagnetic.
III. Substances with $\chi \ll 1$ are ferromagnetic.
IV. Substances with $\mu_r \gg 1$ are ferromagnetic.
A
I and II
B
III and IV
C
II and III
D
II and IV
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
If a paramagnetic bar is brought near a bar magnet, then it is
A
Attracted by both the poles of the bar magnet
B
Repelled by both the poles of the bar magnet
C
Attracted by the South-pole and repelled by the North-pole of the bar magnet
D
Attracted by the North-pole and repelled by the South-pole of the bar magnet
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Two identical circular current loops carrying equal currents are placed with their axes inclined at $45^\circ$ to each other as shown in the figure. The resultant magnetic field at P is
A
$\dfrac{\mu_0 I}{16\sqrt{2}R}\left[(\sqrt{2}+1)\hat{i} + \hat{j}\right]$
B
$\dfrac{\mu_0 I}{16\sqrt{2}R}\left[\sqrt{2}\hat{i} + \hat{j}\right]$
C
$\dfrac{\mu_0 I}{16R}\left[(\sqrt{2}+1)\hat{i} + \hat{j}\right]$
D
$\dfrac{\mu_0 I}{16R}\left[\sqrt{2}\hat{i} + \hat{j}\right]$