1) e = B · l · v for l a) l = e · B / v b) l = B / e · v c) l = e / B · v d) l = v / e · B 2) P = U2 / R for R a) R = U / P b) R = U2 / P c) R = U2 · P d) R = P / U2 3) P = I2 · R for I a) I = ⎷ (P · R) b) I = P / R c) I = P2 / R2 d) I = ⎷ (P/R) 4) P = U2 / R for U a) U = ⎷ (P · R) b) U = P / R c) U = ⎷P2 / R2 d) U = ⎷ (P/R) 5) Q = I · t for t a) t = Q · I b) t = I / Q c) t = Q / I d) t = Q - I 6) U = I · R for I a) I = U · R b) I = U / R c) I = U - R d) I = R / U 7) v = u + at for t a) t = (v - u) / a b) t = u - v / a c) t = v - u / a d) t = a · v - u 8) 1/Rt = 1/R1 + 1/R2 for Rt a) Rt = R1 + R2 b) Rt = 1/R1 + 1/R2 c) Rt = (R1 + R2) / (R1 · R2) d) Rt = (R1 · R2) / (R1 + R2) 9) s = u · t + (1/2) · (a · t2) for a  a) a = ⎷2 · (s - u · t) / t2 b) a = 2 · (s - u · t) / t2 c) a = 2 · s - u · t / t2 d) a = s - u · t / 2t2 10) p = 2 · (w + h) for h a) h = p - w / 2 b) h = (2 · p) / w c) h = (1/2) (p - w) d) h = (1/2) · p - w

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