1. A particle with a charge of –1.24 x 10-8 C is moving with instantaneous velocity 𝑣 =
(1.49 × 104 𝑚
𝑠
) 𝑖̂+ (−3.85 × 104 𝑚
𝑠
)𝑗. What is the force exert ̂ ed on this particle by a magnetic
field (a) 𝐵⃑ = (1.40 𝑇)𝑖̂+ (−2.30 𝑇)𝑘̂ and (b) 𝐵⃑ = (−1.25 𝑇)𝑖̂+ (2.00 𝑇)𝑗̂+ (−3.50 𝑇)�
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