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Electromagnetics MCQ 3

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Questions and Answers

What is the formula for the force experienced by a charged particle moving through a magnetic field?

𝑭 = 𝑞𝑙𝑟

𝑭 = 𝑞𝑣w

𝑭 = 𝑞𝑣𝐵 (correct)

𝑭 = 𝑞𝑙𝐵

Which formula represents the centripetal force acting on an object moving in a circular path?

𝑭 = 𝒎𝑣²l

𝑭 = 𝑚𝑎r

𝑭 = 𝒎𝑙²r

𝑭 = 𝒎𝑣²r (correct)

What is the formula for magnetic flux?

F = 𝐵A/V

F = 𝐵A (correct)

F = 𝐵rA

F = 𝐵V

According to Faraday's Law, what does the induced emf depend on?

Change in magnetic field strength Signup and view all the answers

What formula corresponds to lenz Law?

emf =(−N )(dt / dΦ ) Signup and view all the answers

In a transformer, what does the ratio $\frac{V_i}{V_o}$ represent?

Ratio of number of turns in the primary coil to number of turns in the secondary coil Signup and view all the answers

What is the formula for the force acting on a current-carrying conductor in a magnetic field?

𝑭 = 𝑰𝒍𝑩 Signup and view all the answers

What is the formula for the root mean squared voltage in an alternating voltage system?

𝑽𝒓𝒎𝒔 = 𝑽0√2 Signup and view all the answers

Which of the following formulas is incorrect in relation to electromagnetics?

emf = ILQ Signup and view all the answers

Which law states that the direction of the induced emf is always such as to oppose the change causing it?

Lenz's law Signup and view all the answers