A shunt motor runs at 500rpm on a 200V circuit. Its armature resistance is 0.5Ω and the current taken is 30A in addition to field current. What resistance must be placed in series with armature circuit to reduce to speed to 300 rpm; the current in armature remains same.

M

Mr. Dubey • 89.33K Points
Coach

Q. A shunt motor runs at 500rpm on a 200V circuit. Its armature resistance is 0.5Ω and the current taken is 30A in addition to field current. What resistance must be placed in series with armature circuit to reduce to speed to 300 rpm; the current in armature remains same.

(A) 4.24Ω

(B) 3.78Ω

(C) 6.74Ω

(D) 2.47Ω

Correct Answer - Option(D)
Views: 348
Filed under category Electrical and Electronics Engineering

Share

No solution found for this question.
Add Solution and get +2 points.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs

Q. In case of automobile moving under normal road conditions the amount of fuel injected is proportional to

Q. A spring that shoots jets of hot water and steam into the air is called as

Q. 3 BALANCING MACHINES-FIELD BALANCING OF DISCS AND ROTORS.

Q. Which thermocouple can measure the highest temperature?

Q. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

Q. In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL

Q. For better fuuidity of the molten metal, the following is added in blast furnace

Q. Which pin of the LCD is used for adjusting its contrast?

Q. Which of the following power plant can be easily started from cold conditions?

Q. Which of the following are examples of appropriate applications of additive manufacturing in the actual production of parts and products?

Question analytics