1.Answer: (b) $q(\vec{v} \times \vec{B})$
2.Answer: (c) Electric and Magnetic force
3.Answer: (d) Circular
4.Answer: Tesla (T)
5.Answer: Zero (0)
6.Answer: Zero (0)
7.Answer: Helical
8.Answer: Fleming's Left-Hand Rule (or Right-Hand Cross Product Rule)
9.Answer: $r = \frac{mv}{qB}$
10.Answer: $T = \frac{2\pi m}{qB}$
11.Answer: (c) Both $I$ and $\sin\theta$
12.Answer: (a) $\frac{\mu_0 I}{2R}$
13.Answer: (b) Permeability of free space
14.Answer: $10^{-7}$
15.Answer: Thumb / Grip
16.Answer: $\frac{\mu_0 I}{2\pi r}$
17.Answer: True
18.Answer: True
19.Answer: $T \cdot m/A$ (or $H/m$)
20.Answer: $B = \frac{\mu_0 I R^2}{2(R^2 + x^2)^{3/2}}$
21.Answer: A -> 3; B -> 1; C -> 2; D -> 5; E -> 4
22.Answer: Symmetrical
23.Answer: Solenoid
24.Answer: Parallel (or uniform/straight)
25.Answer: True
26.Answer: False (It relates to the total *current* enclosed, not charge)
27.Answer: Circle (or Ring)
28.Answer: Number of turns per unit length ($N/L$)
29.Answer: $\oint \vec{B} \cdot d\vec{l} = \mu_0 I_{enc}$
30.Answer: $B_{end} = \frac{1}{2} \mu_0 n I$
31.Answer: (a) Attract each other
32.Answer: (b) Repel each other
33.Answer: (b) $\frac{\mu_0 I_1 I_2}{2\pi d}$
34.Answer: Ampere
35.Answer: 1 (One)
36.Answer: $2 \times 10^{-7}$
37.Answer: Repulsive
38.Answer: True
39.Answer: True
40.Answer: $\vec{F} = I (\vec{l} \times \vec{B})$
41.Answer: (b) $N I \vec{A}$
42.Answer: (b) $\vec{m} \times \vec{B}$
43.Answer: (b) $A \cdot m^2$
44.Answer: Dipole
45.Answer: Gyromagnetic
46.Answer: Parallel
47.Answer: True
48.Answer: False (Stable equilibrium is when $\vec{m}$ is *parallel* to $\vec{B}$, i.e., $\theta=0$)
49.Answer: Bohr
50.Answer: $\mu_l = \frac{e}{2m_e} L$
51.Answer: (b) Torque exerted on a current-carrying loop in a magnetic field
52.Answer: (b) Cylindrical soft iron core and concave pole pieces
53.Answer: (c) A low resistance (shunt) in parallel
54.Answer: High, Series
55.Answer: Current
56.Answer: Resistance
57.Answer: False (Because resistance also increases proportionally, negating the effect)
58.Answer: Phosphor-bronze (or simply Bronze)
59.Answer: Twist (or Angle)
60.Answer: $I_s = \frac{\theta}{I} = \frac{NAB}{k}$
