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Magnetic Effects of Electric Current — Class 10 CBSE Science MCQs with Solutions
Free Class 10 CBSE Science Magnetic Effects of Electric Current MCQs with step-by-step solutions. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — easy
Danish physicist who first discovered that an electric current produces a surrounding magnetic field was:
A. Michael Faraday
B. Hans Christian Oersted ✓ Correct
C. James Clerk Maxwell
D. André-Marie Ampère
Solution: Oersted discovered electromagnetism in 1820.
Q2 — easy
Rule used to determine direction of magnetic field lines around a current-carrying straight conductor is:
A. Fleming's Left-Hand Rule
B. Right-Hand Thumb Rule ✓ Correct
C. Fleming's Right-Hand Rule
D. Ampere's Swimming Rule
Solution: Right-Hand Thumb Rule gives magnetic field circulation direction.
Q3 — easy
Pattern of magnetic field lines produced by a current-carrying straight long wire consists of:
A. Parallel straight lines
B. Concentric circles centered on wire ✓ Correct
C. Ellipses
D. Parabolic curves
Solution: Field lines form concentric circles around the wire.
Q4 — easy
Magnetic field pattern produced inside a long current-carrying Solenoid resembles that of a:
A. Horseshoe magnet
B. Bar magnet ✓ Correct
C. Circular disc
D. Spherical magnet
Solution: Solenoid field is uniform inside, mirroring a bar magnet.
Q5 — easy
A soft iron core inserted inside a current-carrying solenoid forms an:
A. Electric fuse
B. Electromagnet ✓ Correct
C. Permanent magnet
D. Inductor
Solution: Current through solenoid magnetizes the soft iron core.
Q6 — easy
Rule used to determine direction of FORCE acting on a current-carrying conductor placed in a magnetic field is:
A. Right-Hand Thumb Rule
B. Fleming's Left-Hand Rule ✓ Correct
C. Fleming's Right-Hand Rule
D. Lenz's Law
Solution: Fleming's Left-Hand Rule gives force direction (Thumb=Force, Forefinger=Field, Center=Current).
Q7 — easy
In Fleming's Left-Hand Rule, Forefinger represents _______, Middle finger represents _______, and Thumb represents _______.
A. Current, Field, Force
B. Magnetic Field, Electric Current, Motion/Force ✓ Correct
C. Force, Field, Current
D. Motion, Current, Field
Solution: Forefinger = Field, Middle = Current, Thumb = Motion/Force.
Q8 — easy
Force experienced by a current-carrying conductor in a magnetic field is MAXIMUM when angle between current and field is:
A. 0°
B. 45°
C. 90° (Perpendicular) ✓ Correct
D. 180°
Solution: Force is maximum when conductor is perpendicular to magnetic field.
Q9 — easy
In domestic electric power supply in India, potential difference between Live wire and Neutral wire is:
A. 110 V
B. 220 V ✓ Correct
C. 440 V
D. 230 V
Solution: Standard Indian household AC supply is 220 V at 50 Hz.
Q10 — easy
In Indian domestic wiring, color insulation of Live wire, Neutral wire, and Earth wire are respectively:
A. Red, Black, Green ✓ Correct
B. Black, Red, Green
C. Green, Red, Black
D. Red, Green, Black
Solution: Live = Red/Brown, Neutral = Black/Blue, Earth = Green/Yellow.
Q11 — easy
Frequency of alternating current (AC) supplied in Indian homes is:
A. 60 Hz
B. 50 Hz ✓ Correct
C. 100 Hz
D. 120 Hz
Solution: Indian domestic AC frequency is 50 Hz.
Q12 — easy
Safety device connected in series with Live wire to prevent damage from short-circuiting or overloading is:
A. Ammeter
B. Electric Fuse ✓ Correct
C. Voltmeter
D. Transformer
Solution: Fuse wire melts during overcurrent to break the circuit.
Q13 — easy
Earth wire is connected to metal body of electric appliances (like refrigerator, iron) to prevent:
A. Overheating
B. Severe electric shock due to current leakage ✓ Correct
C. Short-circuiting
D. High bills
Solution: Earth wire safely diverts leakage current to ground.
Q14 — easy
Sudden steep rise in electric current in a domestic circuit when Live wire touches Neutral wire directly is:
A. Overloading
B. Short-circuiting ✓ Correct
C. Earthing
D. Magnetization
Solution: Direct contact between live and neutral wires causes a short circuit.
Q15 — easy
Direction of magnetic field inside a current-carrying solenoid is from:
A. North to South pole
B. South to North pole ✓ Correct
C. East to West
D. West to East
Solution: Inside a solenoid, magnetic field runs from South to North pole.