12TH CBSE PHYSICS Moving Charges And Magnetism MCQS WITH SCORE CHECK

Moving Charges & Magnetism - 20 MCQ Test

Q1. The magnetic field around a straight current carrying conductor is
Radial
Circular
Elliptical
Zero

Q2. The SI unit of magnetic field is
Tesla
Weber
Henry
Gauss

Q3. Current carrying conductor produces
Only electric field
Only magnetic field
Both electric and magnetic fields
None

Q4. Ampere's circuital law is derived from
Ohm's law
Biot-Savart law
Kirchhoff's law
Gauss law

Q5. A circular current loop behaves like a
Capacitor
Bar magnet
Resistor
Transformer

Q6. Magnetic field at the centre of a circular coil is proportional to
I/r
r/I
1/I
r²

Q7. Cyclotron accelerates
Neutral particles
Positive charged particles
Photons
Neutrons

Q8. Lorentz force is maximum when angle between v and B is
0°
30°
60°
90°

Q9. If a charge moves parallel to magnetic field, force is
Maximum
Zero
Half
Infinite

Q10. Direction of magnetic field around wire is given by
Fleming's rule
Right hand thumb rule
Lenz law
Coulomb law

Q11. Inside an ideal long solenoid, magnetic field is
Zero
Uniform
Random
Infinite

Q12. Magnetic force on a moving charge is
qE
qvB sinθ
mv²/r
IBL

Q13. Two parallel currents in same direction
Repel
Attract
No force
Oscillate

Q14. Torque on current loop is maximum when θ=
0°
45°
90°
180°

Q15. Ideal ammeter has resistance
Infinite
Zero
1 Ω
100 Ω

Q16. Ideal voltmeter has resistance
Zero
10 Ω
Infinite
100 Ω

Q17. Magnetic field outside an ideal toroid is
Maximum
Uniform
Zero
Variable

Q18. Magnetic dipole moment of coil equals
NIA
NIAI
NIA×I
N²IA

Q19. The path of electron entering perpendicular to uniform magnetic field is
Straight
Parabola
Circle
Ellipse

Q20. The force between parallel wires is proportional to
Distance
Product of currents
Voltage
Resistance