Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat | mosaicbro.com

Magnetism and Electromagnetism | Practice MCQs Physics for Mdcat

7 of 127 questions (Page 6 of 19)

Filter by Category

36 The standard vector symbol for flux density is:
Correct Answer: D
Explanation: Flux density is denoted by $B$.
37 When an ion (or charged particle) is projected along a perpendicular path to a uniform magnetic field, its trajectory is:
Correct Answer: D
Explanation: Perpendicular motion results in circular path due to centripetal force.
38 An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if:
Correct Answer: C
Explanation: No deflection occurs when electric and magnetic forces balance: $E = vB$.
39 Magnetic field along the axis of a solenoid with n turns per meter carrying a current I is given by:
Correct Answer: C
Explanation: For a solenoid, $B = \mu_0 nI$.
40 The equation $B = \mu_o NI/2 \pi R$ for a toroid can be derived by applying:
Correct Answer: C
Explanation: Ampere’s law is used to derive the toroid field formula.
41 Which one of the following particles moving in the magnetic field cannot be deflected?
Correct Answer: D
Explanation: Neutrons are neutral and experience no magnetic force.
42 The experiments show that whenever there is a change in the magnetic flux linked with a loop closed circuit there is always:
Correct Answer: B
Explanation: Faraday’s law states that changing flux induces emf.
MCQs Bank by mosaicbro.com