Free Test Lenz's law – NEET

Q1: Which law gives the direction of induced current?

A. Faraday's Law B. Ampere's Law C. Lenz's Law D. Ohm's Law

Q2: Lenz's law is in accordance with which principle?

A. Law of conservation of charge B. Law of conservation of momentum C. Law of conservation of energy D. None of these

Q3: If a magnet is pushed into a coil, the direction of induced current is such that it will

A. Attract the magnet B. Repel the magnet C. Remain unaffected D. None of the above

Q4: Lenz's law is a consequence of which fundamental principle?

A. Conservation of charge B. Conservation of energy C. Conservation of momentum D. Coulomb’s Law

Q5: Direction of induced current in Lenz’s law is such that it opposes the

A. Voltage applied B. Magnetic field C. Change in magnetic flux D. Resistance

Q6: A north pole is moved towards a coil. The face of the coil towards the magnet behaves like a

A. North pole B. South pole C. Neutral D. None of these

Q7: According to Lenz’s law, the induced current produces a magnetic field that

A. Enhances the change B. Opposes the change C. Has no effect D. Varies linearly with time

Q8: Lenz’s law applies to which of the following?

A. Moving magnets B. Changing electric fields C. Changing magnetic fields D. All of the above

Q9: What happens if Lenz’s law did not hold true?

A. Current would flow indefinitely B. Energy would be created C. Flux would remain constant D. None of the above

Q10: In a generator, Lenz’s law ensures that the mechanical energy is converted to

A. Heat energy B. Electrical energy C. Kinetic energy D. Magnetic energy

Q11: A coil is rotated in a magnetic field. According to Lenz’s law, the induced EMF will

A. Support motion B. Oppose motion C. Be zero D. Be maximum when stationary

Q12: Lenz's law is mathematically incorporated as the

A. Positive sign in Faraday’s law B. Negative sign in Faraday’s law C. EMF = B.dA D. E = IR

Q13: When magnetic flux through a coil increases, induced current flows in a direction that

A. Supports the increase B. Opposes the increase C. Does not change D. Reverses periodically

Q14: A coil has induced current due to a moving magnet. The direction of this current is found using

A. Lenz’s law B. Ohm’s law C. Coulomb’s law D. Ampere’s law

Q15: In Lenz’s law, if the change in flux is reversed, the direction of induced current will be

A. Unchanged B. Reversed C. Zero D. Doubled

Q16: Lenz’s law helps in designing which electrical device?

A. Transformer B. Motor C. Generator D. Inductor

Q17: If a loop is moved out of a magnetic field, induced current will

A. Flow in same direction as before B. Reverse direction C. Be zero D. Increase

Q18: In Lenz’s law, the induced current opposes the cause due to

A. Magnetic resistance B. Electric resistance C. Inertia D. Conservation of energy

Q19: Which rule helps find the direction of induced current using Lenz’s law?

A. Right hand rule B. Left hand rule C. Fleming’s right-hand rule D. LCR rule

Q20: Lenz’s law confirms that induced EMF always

A. Helps the change B. Supports external force C. Opposes change in flux D. Remains zero

Quiz for Lenz's law