Quiz for Magnetic Effects of Current

Q1: What is the direction of the magnetic field around a current-carrying straight conductor?

A. Clockwise B. Anticlockwise C. Along the wire D. Opposite to current

Q2: The unit of magnetic field is:

A. Tesla B. Weber C. Henry D. Coulomb

Q3: Which law gives the direction of magnetic field due to a current element?

A. Faraday’s Law B. Ampere’s Law C. Biot–Savart Law D. Lenz’s Law

Q4: The magnetic field inside a long straight solenoid is:

A. Non-uniform B. Zero C. Uniform and parallel to axis D. Circular

Q5: Which rule is used to find the direction of force on a current-carrying conductor in a magnetic field?

A. Lenz’s Rule B. Fleming’s Right Hand Rule C. Fleming’s Left Hand Rule D. Right-hand thumb rule

Q6: The force between two parallel conductors carrying current is:

A. Attractive if currents are in same direction B. Repulsive in all cases C. Zero D. Attractive if currents are opposite

Q7: The magnetic field at the center of a circular loop carrying current is:

A. Zero B. Maximum C. Depends on radius D. Uniform

Q8: Which material is most suitable for making electromagnets?

A. Aluminium B. Copper C. Soft iron D. Steel

Q9: If a wire is bent into a loop and current is passed, the field at center is:

A. Zero B. Strong and directed perpendicular to plane C. Strong and circular D. Along the current

Q10: Ampere’s circuital law is applicable to:

A. Only static currents B. Only dynamic currents C. Only solenoids D. Any symmetrical current distribution

Q11: Which of the following can produce magnetic field?

A. Static charge B. Moving charge C. Insulator D. None

Q12: The force on a moving charge in magnetic field is zero when:

A. It moves parallel to field B. It moves perpendicular to field C. It is at rest D. Both A and C

Q13: Which instrument is used to detect current?

A. Voltmeter B. Galvanometer C. Ammeter D. Multimeter

Q14: Lorentz force is the combination of:

A. Electric and Gravitational force B. Electric and Magnetic force C. Gravitational and Magnetic force D. Electric and Nuclear force

Q15: The field lines due to a bar magnet resemble that of:

A. Current carrying wire B. Solenoid C. Dipole D. None

Q16: Magnetic field due to a current-carrying conductor depends on:

A. Current only B. Distance only C. Both current and distance D. Neither

Q17: A magnetic field exerts a force on:

A. Stationary charge B. Moving charge C. Magnet only D. Insulator

Q18: In right-hand rule, thumb represents:

A. Magnetic field B. Current C. Force D. Velocity

Q19: The magnetic field inside a toroid is:

A. Zero B. Non-uniform C. Constant and confined within core D. Only outside

Q20: A moving coil galvanometer can be converted to an ammeter by:

A. Using high resistance in series B. Using low resistance in parallel C. Using no resistance D. Using capacitor