DC Machines

(a) None.

(b) copper and mechanical losses.

(c) copper and iron losses.

(d) iron and mechanical losses.

(a) Copper loss and stray load loss.

(b) Copper loss and core loss.

(c) Core loss and load loss.

(d) Core loss and mechanical loss.

(a) T is independent of P.

(b) T² ∝ P³

(c) T ∝ P

(d) T ∝√P

(a) square of the armature speed.

(b) square of the flux density.

(c) square of the supply voltage.

(d) supply voltage.

(a) series resistance with a high value.

(b) parallel resistance with a high value

(c) series resistance with a low value.

(d) parallel resistance with a low value.