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1
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Out of the following which law obeys the law of conservation of energy?

A
Kirchhoff's $1^{\text {st }}$ law in electricity.
B
Lenz's law in induction.
C
Ampere's circuital law.
D
Gauss's law in electrostatics.
2
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic flux through a coil is $4 \times 10^{-4} \mathrm{~Wb}$ at time $t=0$. It reduces to $30 \%$ of its original value in time $t$ second. If e.m.f. induced in the coil is 0.56 mV then the value of $t$ is

A
0.5 s
B
$\quad 0.4 \mathrm{~s}$
C
0.8 s
D
0.7 s
3
MHT CET 2025 19th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
When three inductors of same inductance ' $L$ ' are connected in series and ' I ' is the current passing through the circuit. The energy stored in the circuit is
A
$\frac{1}{2} \mathrm{LI}^2$
B
$\frac{3}{2} \mathrm{LI}^2$
C
$\frac{5}{2} \mathrm{LI}^2$
D
$\frac{7}{2} \mathrm{LI}^2$
4
MHT CET 2025 19th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
The self-inductance of a circuit is numerically equal to
A
the work done in establishing the magnetic flux associated with circuit.
B
twice the work done in establishing the magnetic flux associated with unit current in the circuit.
C
thrice the work done in establishing the magnetic flux associated with unit current in the circuit.
D
the work done in establishing the magnetic flux associated with unit current in the circuit.
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