1
KCET 2020
MCQ (Single Correct Answer)
+1
-0

The current in a coil of inductance $$0.2 \mathrm{H}$$ changes from $$5 \mathrm{~A}$$ to $$2 \mathrm{~A}$$ in $$0.5 \mathrm{~s}$$. The magnitude of the average induced emf in the coil is

A
0.6 V
B
1.2 V
C
30 V
D
0.3 V
2
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Consider the situation given in figure. The wire $$A B$$ is slid on the fixed rails with a constant velocity. If the wire $$A B$$ is replaced by a semicircular wire, the magnitude of the induced current will

KCET 2019 Physics - Electromagnetic Induction Question 10 English

A
increase
B
remain same
C
decrease
D
increase or decrease depending on whether the semicircle bulges towards the resistance or away from it.
3
KCET 2018
MCQ (Single Correct Answer)
+1
-0
The magnetic flux linked with a coil varies as $\phi=3 t^2+4 t+9$. The magnitude of the emf induced at $t=2 \mathrm{~s}$ is
A
8 V
B
32 V
C
16 V
D
64 V
4
KCET 2018
MCQ (Single Correct Answer)
+1
-0
A step-up transformer operates on a 230 V "ne and a load current of 2 A . The ratio of primary and secondary windings is $1: 25$. Then, the current in the primary is
A
25 A
B
50 A
C
15 A
D
12.5 A
KCET Subjects
EXAM MAP