(A) North Korea
(B) South Korea
(C) China
(D) Spain
The core of a transformer is laminated to reduce:
(A) copper loss
(B) magnetic loss
(C) eddy current loss
(D) hysteresis loss
The core of transformer is laminated so that:
(A) 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
27 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)
South Asia has 22% of word population The percentage of income it has:
(A) 22%
(B) 10%
(C) 5%
(D) 1%
From when did the euro became the legal tender:
(A) 1 December 1999
(B) 1 January 1999
(C) 1 January 2001
(D) 1 January 2000