OBJECTIVE TYPE QUESTIONS ELECTRICAL MACHINES – II 1. In an alternator, voltage drops occurs in (A) armature resistance only (B) armature resistance and leakage reactance (C) armature resistance, leakage reactance and armature reaction (D) armature resistance, leakage reactance, armature reaction and earth connections. 2. The magnitude of various voltage drops that occur in an alternator, depends on (A) power factor of the load (B) load current (C) power factor x load current (D) power factor x (load current) 2 . 3. In an alternator, at lagging power factor, the generated voltage per phase, as compared to that at unity power factor (A) must be same as terminal voltage (B) must be less than the terminal voltage (C) must be more than the terminal voltage (D) must be 1.41 time the terminal voltage. 4. The power factor of an alternator depends on (A) Load (B) Speed of rotor (C) Core losses (D) Armature losses. 5.
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