Electromagnetism — Physics MCQs (Class 12)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#1 The SI unit of magnetic field is
A) Tesla
B) Weber
C) Henry
D) Gauss
#2 The magnetic field due to a straight current-carrying conductor is
A) Directly proportional to the current
B) Inversely proportional to the distance
C) Both A and B
D) Neither A nor B
#3 The magnetic field at the center of a circular coil is
A) Directly proportional to the current
B) Inversely proportional to the radius
C) Both A and B
D) Neither A nor B
#4 The magnetic field inside a solenoid is
A) Uniform
B) Non-uniform
C) Zero
D) Maximum at the center
#5 The magnetic field inside a toroid is
A) Uniform
B) Non-uniform
C) Zero
D) Maximum at the center
#6 The force on a current-carrying conductor in a magnetic field is given by
A) $F=I(\vec{l}\times\vec{B})$
B) $F=I(\vec{B}\times\vec{l})$
C) $F=IlB\sin\theta$
D) All of these
#7 The force between two parallel current-carrying conductors is
A) Directly proportional to the product of currents
B) Inversely proportional to the distance
C) Both A and B
D) Neither A nor B
#8 The force is attractive if the currents are
A) In the same direction
B) In opposite directions
C) Perpendicular to each other
D) At an angle of 45°
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