Greetings, future educators preparing for the
Haryana Teacher Eligibility Test (HTET) 2023! As you embark on your journey to
become a teacher, mastering physics concepts is essential, and one such
fundamental concept is "Self-Inductance." This topic not only plays a
significant role in the world of physics but is also a key component of the
HTET exam syllabus. In this comprehensive guide, we will delve into
Self-Inductance through a series of Multiple Choice Questions (MCQs), helping
you solidify your grasp on this subject and ensuring you're well-prepared to
tackle Self-Inductance-related questions in HTET 2023.
1. What is self-inductance?
a.
The tendency of a coil
to oppose a change in current flowing through it.
b.
The ability of a coil to
induce a voltage in another nearby coil.
c.
The resistance of a coil
to the flow of direct current.
d.
The phenomenon where two
coils mutually induce voltages in each other.
2.
Which unit is used to measure self-inductance?
a.
Ohm (Ω)
b.
Volt (V)
c.
Henry (H)
d.
Farad (F)
3.
If the current in a coil with self-inductance of
2 Henry changes at a rate of 4 Amperes per second, what is the induced voltage?
a.
0.5 V
b.
2 V
c.
4 V
d.
8 V
4.
When the current in a coil increases, what
happens to the magnetic field and self-inductance?
a.
Magnetic field
decreases, self-inductance decreases.
b.
Magnetic field
increases, self-inductance decreases.
c.
Magnetic field
decreases, self-inductance increases.
d.
Magnetic field
increases, self-inductance increases.
5.
What is mutual inductance?
a.
The ability of a coil to
induce a voltage in itself.
b.
The tendency of a coil
to oppose a change in current in another nearby coil.
c.
The resistance of a coil
to the flow of alternating current.
d.
The phenomenon where two
coils induce voltages in each other.
6.
Which unit is used to measure mutual inductance?
a.
Ohm (Ω)
b.
Volt (V)
c.
Henry (H)
d.
Farad (F)
7.
If the mutual inductance between two coils is 3
Henry and the rate of change of current in one coil is 2 Amperes per second,
what is the induced voltage in the other coil?
a.
1 V
b.
2 V
c.
3 V
d.
6 V
8.
In a transformer, which coil has more turns of
wire, the primary or the secondary coil, to achieve step-up voltage transformation?
a.
Primary coil
b.
Secondary coil
c.
Both have the same
number of turns
d.
It depends on the
transformer design
9.
When two coils have a strong mutual inductance,
what happens to the efficiency of energy transfer between them?
a.
Efficiency increases
b.
Efficiency decreases
c.
Efficiency remains
unchanged
d.
Efficiency depends on
the voltage
10. Mutual
inductance is a key principle used in the operation of:
a.
Batteries
b.
Resistors
c.
Capacitors
d.
Transformers
11. Which
of the following factors affects the self-inductance of a coil?
a.
The resistance of the
coil
b.
The number of turns of
wire in the coil
c.
The material from which
the coil is made
d.
The length of the coil
12. According
to Lenz's Law, the direction of the induced voltage in a coil due to
self-inductance will be:
a.
In the same direction as
the change in current
b.
In the opposite
direction to the change in current
c.
Independent of the
change in current
d.
Perpendicular to the
coil
13. If
the self-inductance of a coil is doubled, and the current flowing through it
remains constant, what happens to the induced voltage?
a.
It doubles
b.
It halves
c.
It remains the same
d.
It becomes zero
14. What
is the formula for calculating the self-induced voltage (emf) in a coil?
a.
emf = L / (di/dt)
b.
emf = L * (di/dt)
c.
emf = (di/dt) / L
d.
emf = (di/dt) * L
15. In
mutual inductance, when the current in the primary coil changes, what happens
in the secondary coil?
a.
No induced voltage is
generated in the secondary coil
b.
An induced voltage is
generated in the secondary coil
c.
The secondary coil
opposes the change in current
d.
The secondary coil
remains unaffected
16. In
a transformer, if the primary coil has 200 turns and the secondary coil has 400
turns, what is the turns ratio?
a.
1:1
b.
2:1
c.
1:2
d.
1:4
17. Mutual
inductance is dependent on which of the following factors?
a.
The resistance of the
coils
b.
The number of turns in
the primary coil
c.
The magnetic
permeability of the material between the coils
d.
The length of the coils
18. When
the mutual inductance between two coils is high, what does this indicate about
their magnetic coupling?
a.
They are loosely coupled
b.
They are tightly coupled
c.
The coils have the same
number of turns
d.
Mutual inductance is not
related to magnetic coupling
19. In
a step-down transformer, compared to the primary coil, the secondary coil
typically has:
a.
More turns
b.
Fewer turns
c.
The same number of turns
d.
A different material
20. What
is the main application of mutual inductance in electrical circuits?
a.
Generating electricity
from solar panels
b.
Wireless power
transmission
c.
Capacitor charging
d.
Producing magnetic
fields in solenoids
21. Which
of the following factors affects the self-inductance of a coil?
a.
The resistance of the
coil
b.
The cross-sectional area
of the coil
c.
The material inside the
coil
d.
The temperature of the
surroundings
22. What is the unit of self-inductance?
a. Volt (V)
b. Henry (H)
c. Ohm (Ω)
d. Tesla (T)
23. When the current in a coil decreases, what happens to the induced voltage due to self-inductance?
a. It increases
b. It decreases
c. It remains constant
d. It depends on the number of turns in the coil
24. In a coil with self-inductance, what is the energy stored in the magnetic field proportional to?
a. The square of the current in the coil
b. The square of the number of turns in the coil
c. The resistance of the coil
d. The cross-sectional area of the coil
25. In mutual inductance, what happens to the induced voltage in the secondary coil when the magnetic coupling between the coils is increased?
a. The induced voltage decreases
b. The induced voltage remains the same
c. The induced voltage increases
d. The induced voltage becomes zero
26. Mutual inductance between two coils can be increased by:
a. Increasing the distance between the coils
b. Decreasing the number of turns in the primary coil
c. Increasing the number of turns in the secondary coil
d. Using a non-magnetic material between the coils
27. Which component in a transformer is responsible for transferring electrical energy from the primary coil to the secondary coil?
a. Iron core
b. Capacitor
c. Resistor
d. Diode
28. In a step-up transformer, if the primary coil has 100 turns and the secondary coil has 500 turns, what is the turns ratio?
a. 1:5
b. 5:1
c. 1:2
d. 2:1
29. What is the primary application of mutual inductance in electrical engineering?
a. Charging capacitors
b. Generating magnetic fields
c. Voltage regulation in transformers
d. Reducing resistance in wires
30. If the primary coil of a transformer has an alternating current (AC) flowing through it, what type of current will be induced in the secondary coil?
a. Direct current (DC)
b. Alternating current (AC)
c. Pulsating current
d. No current will be induced
In conclusion, Self-Inductance is a crucial concept
in the realm of physics, and a sound understanding of it will serve you well
not only in HTET 2023 but also in your future teaching career. The MCQs
provided in this guide are designed to test your knowledge, identify areas that
may need more attention, and ultimately boost your confidence on exam day. To
succeed, remember to practice regularly, explore additional resources, and stay
committed to your preparation. With the right approach, you can conquer
Self-Inductance and increase your chances of excelling in HTET 2023. Best of
luck on your journey to becoming a teacher who inspires and imparts knowledge
to the next generation!
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