Class 10 • Physics • Chapter 12
Magnetic Effects of Electric Current
True & False Quiz
Field. Force. Induce.
✓True
✗False
25
Questions
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Ch.12
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Why True & False for Magnetic Effects of Electric Current?
How this format sharpens your conceptual clarity
🔵 Electromagnetism is the principle behind motors, generators, transformers, and all electrical devices — the most application-rich chapter.
✅ T/F tests Fleming's left-hand (motor) vs right-hand (generator) rules, solenoid field, electromagnetic induction, and domestic circuits.
🎯 Fleming's Left-Hand Rule = motor (force); Right-Hand Rule = generator (induced current) — students frequently swap these.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
An electric current flowing in a wire produces a magnetic field around it.
Q 2
Magnetic field lines around a current-carrying wire are straight lines.
Q 3
The direction of the magnetic field around a wire can be found by the Right-Hand Thumb Rule.
Q 4
Magnetic field strength decreases with distance from the conductor.
Q 5
A current-carrying circular loop produces a magnetic field with field lines concentrating at the center.
Q 6
The magnetic field inside a solenoid is non-uniform and weak.
Q 7
The direction of magnetic field in a solenoid can be determined by the Right-Hand Thumb Rule.
Q 8
The force on a current-carrying conductor in a magnetic field depends on the angle between current and magnetic field.
Q 9
Fleming’s Left-Hand Rule helps find the direction of magnetic field around a conductor.
Q 10
The force on a conductor is zero when current is parallel to the magnetic field.
Q 11
Circuit breakers are used in domestic electric circuits to prevent excess current flow.
Q 12
Earth wire is used to carry current back to the source in a domestic circuit.
Q 13
An electromagnet’s strength depends only on the current flowing through it.
Q 14
The magnetic effect of electric current was first discovered by Hans Christian Oersted.
Q 15
Magnetic field lines can intersect each other.
Q 16
The magnetic field of a bar magnet has closed and continuous field lines.
Q 17
The current direction in a conductor does not affect the direction of the magnetic field.
Q 18
Increasing the current through a solenoid decreases its magnetic field strength.
Q 19
The force experienced by a current-carrying conductor in a magnetic field is always perpendicular to both current and field directions.
Q 20
A solenoid can behave like a permanent magnet when current flows through it.
Q 21
A fuse melts to protect an electric circuit in case of excessive current flow.
Q 22
The magnetic field inside a current-carrying circular loop is zero.
Q 23
The earth wire protects users against electric shocks.
Q 24
The magnetic field produced by a current-carrying conductor depends only on the conductor’s length.
Q 25
Changing magnetic fields can induce current in a nearby coil (electromagnetic induction).
Key Takeaways — Magnetic Effects of Electric Current
Core facts for CBSE Boards & exams
1
A current-carrying conductor in a magnetic field experiences a force (motor principle).
2
Fleming's Left-Hand Rule: thumb = force/motion, index = field (B), middle = current (I).
3
Solenoid acts like a bar magnet; field inside is uniform and along the axis.
4
Electromagnetic Induction: changing magnetic field induces EMF (Faraday's law).
5
Fleming's Right-Hand Rule gives direction of induced current in a generator.
6
Domestic circuit: live wire (red/brown), neutral (black/blue), earth (green/yellow); fuse/MCB on live wire.