1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A proton, an electron and an $\alpha$-particle enter at right angles to a uniform magnetic field with the same velocity. If $R_p, R_e$ and $R_\alpha$ are the radii of circular paths of these particles, then
A
$R_\alpha = R_p = R_e$
B
$R_\alpha > R_p > R_e$
C
$R_\alpha < R_p < R_e$
D
$R_\alpha > R_p = R_e$
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
In the figure shown, the conductor PQ of length $l$ is moved from $x = 0$ to $x = b$ and then up to $x = 2b$ with a constant velocity $\vec{v}$. A uniform magnetic field $\vec{B}$ is perpendicular to the plane of the paper and extends from $x = 0$ to $x = b$ and it is zero from $x > b$. The magnitude of emf Induced in the conductor is
A
$B l x; 0 \leq x \leq b$
B
Zero; $0 \leq x \leq b$
C
$B l v; 0 \leq x \leq b$
D
$B l v; b \leq x \leq 2b$
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
In Faraday-Henry's experiment, a coil is connected to a galvanometer. For the deflection of pointer in the galvanometer, which of the following statement/s is/are WRONG?
The pointer in the galvanometer deflects -
(a) When the bar magnet is moved towards the stationary coil along its axis.
(b) When the bar magnet is moved away from the stationary coil along its axis.
(c) When the coil is moved towards the stationary bar magnet along its axis.
(d) When the coil and the magnet are moved without relative motion between them.
A
a and b
B
b and c
C
a, b and c
D
Only d
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A small town with a demand of $900\text{ kW}$ of electric power at $220\text{ V}$ is situated $20\text{ km}$ away from an electric power generating station. Each wire of the two-wire transmission line has a resistance per unit length of $5 \times 10^{-4} \, \Omega\text{ m}^{-1}$. The town gets power from the line through a $45000\text{ V}$ to $220\text{ V}$ step-down transformer at a substation in the town. The line power loss in the form of heat is:
A
$4$ kW
B
$8$ kW
C
$40$ kW
D
$80$ kW