(A) copper loss
(B) magnetic loss
(C) eddy current loss
(D) hysteresis loss
Author:
The core of transformer is laminated so that:
(A) The ratio of the voltage in the secondary to that in the primary may be increased
(B) Energy losses due to eddy currents may be minimized
(C) The weight of the transformer may be reduced
(D) Rusting of the core may be prevented
Energy stored in the choke coil in the form of:
(A) heat
(B) electricity energy
(C) magnetic energy
(D) electro-magnetic energy
If the rotational velocity of a dynamo armature is doubled, then the induced e.m.f will be:
(A) become half
(B) become double
(C) become quadruple
(D) remain unchanged
Quantity that remains unchanged in a transformer is:
(A) voltage
(B) current
(C) frequency
(D) Both (a) & (b)
Shifting agriculture is most commonly practised in:
(A) forests
(B) deserts
(C) plain areas
(D) grass lands
Which of the following is the smallest in terms of area?
(A) Vatican City
(B) Monaco
(C) Nauru
(D) San Marino
Botswana was formerly known as:
(A) Bachuanaland
(B) Bahamas
(C) Barbados
(D) Cameroon