« Back CONTENTS Next » 1. If the number of resistances are connected in series then the equivalent resistance is (A) decreases. (B) increases. (C) remain same. (D) none of the above. 2. Which of the following is not a passive component? (A) Inductor. (B) Capacitor. (C) Resistor. (D) None […]
Electrical MCQ
MCQ on Basic Electronics – 1
« Back CONTENTS Next » 1. The capacitors used in filter circuits of power supplies having output voltage more then 450 V mainly are (a) ceramic capacitors. (b) electrolytic capacitors. (c) mica capacitors. (d) paper capacitors. 2. For the normal operation, a varactor diode is always (a) forward biased. (b) reverse biased. (c) needed to input supply. […]
MCQ on Alternator – 3
« Back CONTENTS Next » 1. The speed of alternator at supply frequency 50 Hz will maximum if it is wound for (a) 2 poles. (b) 4 poles. (c) 6 poles. (d) 8 poles. 2. The armature reaction of an alternator influences (a) rotor speed. (b) terminal voltage per phase. (c) frequency of armature current. (d) generated voltage […]
MCQ on Alternator – 2
« Back CONTENTS Next » 1. At unity load power factor, the effect of armature reaction on the main-field flux of an alternator is (a) nominal. (b) demagnetizing. (c) magnetising. (d) distortional. 2. For proper parallel operation, 3-phase alternators must have the same (a) speed. (b) voltage rating. (c) kVA rating. (d) excitation. 3. Zero power factor method […]
MCQ on Alternator – 1
« Back CONTENTS Next » 1. An alternator is also called (a) synchronous generator. (b) turbo generator. (c) asynchronous generator. (d) generator. 2. Alternators are rated in (a) kW. (b) kVAR. (c) kVA. (d) HP. 3. Three phase alternators are generally (a) star connected. (b) delta connected. (c) open circuited. (d) short circuited. 4. In large alternators damper winding is used to […]
MCQ on Cables – 2
« Back CONTENTS Next » 1. If the length of a cable is increased, its capacitance (a) decreases. (b) increases. (c) remain same. (d) none of the above. 2. Low voltage cables are generally use up to (a) 1.1kV. (b) 3.3kV. (c) 6.6kV. (d) 11kV. 3. Insulated conductor is called as (a) wire (b) conductor. (c) pipe. (d) cable. 4. EHT […]