Speed Control of DC Motors Quiz

What is the purpose of voltage control in DC motors?

• To change the color of the motor

• To regulate the speed of the motor

• To control the temperature of the motor

• To play music

How does increasing voltage affect the speed of a DC motor?

• Decreases

• Stays the same

• Increases

• Has no effect

How does the current control the speed of a DC motor?

• By adjusting the size of the motor

• By varying the voltage or current supplied to the motor

• By using a different type of fuel

• By changing the color of the motor

What happens to the speed of a DC motor when the current is increased?

• Speed remains the same

• Speed fluctuates

• Speed increases

• Speed decreases

What does PWM stand for in the context of DC motor control?

• Pulse Width Modulation

• Power Wave Modulation

• Pulse Width Management

• Pressure Weight Manipulation

How does PWM control the speed of a DC motor?

• By varying the average voltage supplied to the motor

• By adjusting the weight of the motor

• By changing the color of the motor casing

• By increasing the size of the motor shaft

How is torque controlled in a DC motor?

• By adjusting the length of the power cord

• By changing the color of the motor casing

• By varying the armature voltage or field current

• By increasing the number of screws in the motor casing

What is the relationship between torque and speed in a DC motor?

• No relationship

• Inversely proportional

• Unrelated to each other

• Directly proportional

What are some common applications of DC motor speed control?

• Cooking appliances, gardening tools, musical instruments

• Industrial automation, robotics, electric vehicles, conveyor systems

• Toys, bicycles, fishing equipment

• Hair dryers, vacuum cleaners, coffee makers

How is DC motor speed control used in the automotive industry?

• To adjust the tire pressure

• To control the temperature of the engine

• Regulate the speed of electric vehicles and motorized components

• To regulate the air conditioning system