KeUiew 31. Using Fleming's left-hand generator rule, which points to the movement of the conductor? a. center finger bis b. forefinger c. pinky finger d. thumb

Need Help with parts 11 and 12 please.   Thank you

A. The brushes used in a DC generator a) ride against the commutator segments. b) are made from material softer than the commutator segments. c) are generally marked Al and A2 d) all of the above B. A magneto is a DC generator that uses for its pole pieces. a) electromagnets b) permanent magnets c) either "a" or "b" d) neither "a" nor "b"

Draw the circuit

A 4-pole, d.c. generator has a wave-wound armature with 792 conductors. The flux per pole is [751.3 r.p.m.] 1. 0.0121 Wb. Determine the speed at which it should be run to generate 240 V on no-load. 2. A 20 kW compound generator works on full-load with a terminal voltage of 230 V. The armature, series and shunt field resistances are 0.1, 0.05 and 115 Q2 respectively. Calculate the generated e.m.f. when the generator is connected short-shunt. [243.25 V] (Elect. Engg. Madras Univ. April, 1978) 3. A d.c. generator generates an e.m.f. of 520 V. It has 2,000 armature conductors, flux per pole of 0.013 Wb, speed of 1200 r.p.m. and the armature winding has four parallel paths. Find the number of poles. [4] (Elect. Technology, Aligarh Univ. 1978) When driven at 1000 r.p.m. with a flux per pole of 0.02 Wb, a d.c. generator has an e.m.f. of 200 V. If the speed is increased to 1100 r.p.m. and at the same time the flux per pole is reduced to 0.019 Wb per pole, [209 V] 4. what is then the induced…

The frequency of rotor current in an induction motor is       slip times the frequency of stator current.       slip times the frequency of supply,     One by slip times the frequency of stator current.       One by slip times the frequency of supply

For 6 polar D.C machine armature has 36 number of slots and the type of winding is a double layer simplex lap winding. a. How many coils are present? b. What is the coil span in terms of number of slots? c. If each coil has 4 turns, then what is the total number of armature conductors presents? d. How many parallel paths will be their in the armature? e. Altogether how many brushes will be their?

25. A six-pole wave wound armature has 250 conductors when driven at 400 rpm, the emf generated is 260 V. What is the useful flux per pole?a. 50 mWbb. 48 mWbc. 52 mWbd. 55 mWb

10.a. Which one of the following leads on a dual-voltage motor serves as a motor terminal?A. T2B. T5C. T7D. T410.b. The total flux per pole of a reconnected motor is 900,000 lines of force. If the cross-sectional area ofthe laminated core is 6 sq in. and the cross-sectional area of the teeth per pole is 14 sq in., the flux densityin the teeth is approximatelyA. 120,000 lines.B. 101,000 lines.C. 105,000 lines.D. 98,300 lines.

Can you please answer Problem 49 to 51.