Magnetic Effects of Electric Current MCQs – NCERT Science Class X Ch.12 | Academia Aeternum
NCERT  ·  Science  ·  Class X  ·  Ch.12

Magnetic Effects of Electric Current
MCQ Master Series

Magnetic Field · Solenoid · Force on Conductor · DC Motor · Electromagnetic Induction

🎯 50 Questions
⏱ 30 min Suggested
📊 3 Difficulty Tiers
🗂 6 Topics
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Question Intelligence

Quiz Analytics

A data-driven breakdown of all 50 questions by difficulty, exam origin and topic distribution.

📈 Distribution Overview

50
Total Questions
CBSE Board
26
State Board
15
Olympiad Level
9

🗂 Topic Coverage

Magnetic Field & Field Lines
18%
Oersted's Experiment
12%
Solenoid & Electromagnet
18%
Force on Conductor
16%
DC Electric Motor
16%
Electromagnetic Induction
20%
26
CBSE Board
15
State Board
9
Olympiad Level
Conceptual Framework

Key Concept Highlights

6 foundational pillars that power every question in this quiz. Understand these, and the answers follow naturally.

🧲
Magnetic Field Lines
Lines go from N to S outside magnet. They never intersect. Density indicates field strength. Earth has its own magnetic field.
⚡
Oersted's Experiment
Current-carrying wire deflects a nearby compass needle. Magnetic field forms concentric circles around the wire. Direction: Right-hand thumb rule.
🔁
Solenoid
A coil of insulated wire. Behaves like a bar magnet when current flows. N-pole determined by right-hand rule. Core (soft iron) strengthens the field.
💫
Force on Conductor
F = BIl sinθ. Fleming's Left-Hand Rule: FBI rule (F = force, B = field, I = current). Used in electric motors.
⚙️
DC Electric Motor
Converts electrical energy to mechanical energy. Components: armature coil, permanent magnet, brushes, commutator (reverses current direction each half-cycle).
🌊
EM Induction
Changing magnetic flux induces EMF (Faraday). Direction: Lenz's law (opposes change) = Fleming's Right-Hand Rule. AC Generator is the application.
Pedagogical Value

Why MCQs Matter

Multiple-choice questions are not mere guessing games — they are the sharpest diagnostic tool available to a competitive exam aspirant.

~10%

of CBSE Science — rules and diagrams are the key to full marks

Quick Reference

Important Formula Capsules

4 must-memorise equations that surface repeatedly across CBSE and JEE papers.

Force on Conductor
\[ F = BIl\sin\theta \]
Faraday's Law
\[ \varepsilon = -N\dfrac{d\Phi}{dt} \]
RH Thumb Rule
\[ \text{Thumb} = I \text{ direction} \Rightarrow \text{Curl} = B \text{ direction} \]
Fleming's LHR
\[ F \perp B \perp I \quad (\text{FBI}) \]
Learning Outcomes

What You Will Learn

By completing this quiz set you will have exercised all the following competencies.

01 Draw and interpret the magnetic field pattern around a straight wire and a solenoid
02 Apply Fleming's Left-Hand Rule to find the direction of force on a current-carrying conductor
03 Describe the construction and working principle of a DC electric motor
04 Explain electromagnetic induction and state Faraday's and Lenz's laws
05 Describe the working of an AC generator
06 Distinguish between AC and DC current and give one use each
Exam Preparation

Strategy & Preparation Tips

4 evidence-based strategies to maximise your score in CBSE Boards and JEE.

Step 01
Three Hand Rules
(1) Right-Hand Thumb (straight wire field), (2) Right-Hand Grip (solenoid poles), (3) Fleming's Left-Hand (motor/force), (4) Fleming's Right-Hand (generator). Practise using actual hands.
Step 02
Motor vs Generator
Motor: electrical → mechanical (LHR). Generator: mechanical → electrical (RHR). This one conceptual distinction handles ~6 MCQs per set.
Step 03
Commutator Function
CBSE asks "what is the role of commutator?" Answer: it reverses the direction of current in the armature coil every half rotation to maintain rotation.
Step 04
Field Line Properties
Four properties in 4 points: (1) N→S outside, S→N inside, (2) never intersect, (3) form closed loops, (4) density = field strength.

Ready to Test Your Mastery?

50 questions  ·  Elapsed timer  ·  Instant scored results

⚡ Begin Magnetic Effects of Electric Current Quiz
🎯 Knowledge Check

Physics — Magnetic Effects Of Electric Current

50 Questions Class 10 MCQs
1
The magnetic field around a straight current-carrying conductor is in the form of:
2
The device used to detect the presence of current in a circuit is:
3
The SI unit of magnetic field is:
4
The magnetic field inside a long straight solenoid is:
5
The direction of force on a current-carrying conductor in a magnetic field is given by:
6
The magnetic field produced by a current in a conductor increases when:
7
The Earth’s magnetic field is due to:
8
The strength of magnetic field inside a solenoid can be increased by:
9
An electromagnet uses:
10
A commutator is used in an electric motor to:
11
The rule used to find direction of magnetic field around a current-carrying conductor is:
12
The north pole of a magnet moves which way in a magnetic field?
13
A solenoid behaves like a:
14
In an electric motor, the armature rotates because:
15
Electromagnetic induction means:
16
A magnetic field exists around:
17
The South pole of a magnet is attracted to:
18
If the current in a conductor is reversed, the magnetic field:
19
Magnetic field lines never:
20
A current-carrying loop experiences:
21
If number of turns in a solenoid are doubled, magnetic field:
22
Fleming’s right-hand rule is used to find direction of:
23
Which material is best for electromagnets?
24
The magnetic field strength is strongest:
25
Which of the following is NOT an application of electromagnets?
26
Inside a magnet, magnetic field lines run from:
27
Outside a magnet, magnetic field lines run from:
28
The force on a conductor in a magnetic field is maximum when angle between current and field is:
29
A magnetic compass works on the principle of:
30
The field lines are denser when magnetic field is:
31
The North pole of a freely suspended magnet points:
32
The magnetic field is weakest:
33
The magnetic field inside a current loop is:
34
Electromagnets are used in:
35
Increasing area of coil in a generator:
36
The primary function of brushes in an electric motor is to:
37
A straight conductor carrying current in magnetic field experiences force if:
38
When current stops in an electromagnet, the magnetism:
39
The direction of magnetic field lines around a conductor depends on:
40
The core of an electromagnet must be made of:
41
Force on a charged particle moving in magnetic field is:
42
Magnetic field is measured using:
43
In a DC motor, torque is produced because:
44
Magnetic field lines crowd more at poles because:
45
A neutral conductor placed in magnetic field:
46
A solenoid converts:
47
Magnetic field due to solenoid resembles that of:
48
Fleming’s left-hand rule is used in:
49
Magnetic field lines emerge from:
50
The device that produces electric current using mechanical motion is:
📚
ACADEMIA AETERNUM तमसो मा ज्योतिर्गमय · Est. 2025
Sharing this chapter
Test Yourself: 50 Magnetic Effects MCQs Class 10
Test Yourself: 50 Magnetic Effects MCQs Class 10 — Complete Notes & Solutions · academia-aeternum.com
Understanding how electric current produces a magnetic effect is a key concept in Class X Science. This chapter explores the deep connection between electricity and magnetism through fundamental principles such as magnetic field lines, right-hand thumb rule, electromagnetic induction, solenoids, electric motors, and generators. The following carefully curated MCQs are designed to strengthen conceptual clarity, improve analytical thinking, and enhance exam readiness. Each question follows the…
🎓 Class 10 📐 Science 📖 NCERT ✅ Free Access 🏆 CBSE · JEE
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Exam tip: Sharing chapter notes with your study group creates a reinforcement loop. Teaching a concept is the fastest path to mastering it.

Frequently Asked Questions

The region around a magnet or current-carrying conductor within which its magnetic influence can be felt is called a magnetic field.

Imaginary lines that represent the direction and strength of the magnetic field. They emerge from the North pole and enter the South pole.

Outside a magnet: North ? South. Inside the magnet: South ? North, forming closed loops.

A stronger magnetic field.

If we hold the current-carrying conductor with the right hand such that the thumb points in the direction of current, then the curled fingers show the direction of magnetic field lines.

Concentric circles formed around the conductor; strength increases with increase in current and decreases with distance.

\( B \propto \dfrac{I}{r} \), where I is current and r is distance.

The direction of the magnetic field also reverses.

A long coil of closely spaced circular turns of insulated wire.

It produces a uniform strong magnetic field inside it, with a defined North and South pole.

A temporary magnet formed when current passes through a coil wrapped around a soft iron core.

Used in electric bells, cranes, speakers, relays, magnetic locks, etc.

A device that converts electrical energy to mechanical energy.

On the magnetic effect of electric current and force on a current-carrying conductor.

If the thumb, forefinger, and middle finger of the left hand are placed perpendicular: Forefinger = magnetic field, Middle finger = current, Thumb = direction of force.

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    ACADEMIA AETERNUM तमसो मा ज्योतिर्गमय · Est. 2025
    Sharing this chapter
    Test Yourself: 50 Magnetic Effects MCQs Class 10
    Test Yourself: 50 Magnetic Effects MCQs Class 10 — Complete Notes & Solutions · academia-aeternum.com
    Understanding how electric current produces a magnetic effect is a key concept in Class X Science. This chapter explores the deep connection between electricity and magnetism through fundamental principles such as magnetic field lines, right-hand thumb rule, electromagnetic induction, solenoids, electric motors, and generators. The following carefully curated MCQs are designed to strengthen conceptual clarity, improve analytical thinking, and enhance exam readiness. Each question follows the…
    🎓 Class 10 📐 Science 📖 NCERT ✅ Free Access 🏆 CBSE · JEE
    Share on
    WhatsApp
    Telegram
    X / Twitter
    Facebook
    Instagram
    Threads
    Pinterest
    LinkedIn
    Quora
    Discord
    Reddit
    Email
    academia-aeternum.com/class-10/science/magnetic-effects-of-electric-current/mcqs/ Copy link
    💡
    Exam tip: Sharing chapter notes with your study group creates a reinforcement loop. Teaching a concept is the fastest path to mastering it.

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