Magnetism and machines

Question 1 of 10

The speed of a DC shunt motor is fairly

Question 2 of 10

Hysteresis loss in a transformer core is reduced by using

Question 3 of 10

The direction of force on a current-carrying conductor in a magnetic field is given by

Question 4 of 10

The rule used to find the direction of induced current in a generator is

Question 5 of 10

The part of a d.c. motor that reverses the current in the coil every half turn is the

Question 6 of 10

A transformer has 2% copper loss and 1% iron loss at full load. Its efficiency is about

Question 7 of 10

The rule used to find the direction of the induced current in a generator is

Question 8 of 10

The efficiency of a transformer with 960 W output and 1,000 W input is

Question 9 of 10

Carbon brushes in a DC motor

Question 10 of 10

Laminating the core of a transformer reduces