a) 2.5 ohms
b) 6.25 ohms
c) 62.5 ohms
d) 625 ohms

Ans: (c)

a) KW
b) Ampere-house
c) KVA
d) VARH

Ans: (b)

a) Low frequency alternating current
b) High frequency alternating current
c) Direct current
d) Direct current and alternating current both

Ans: (c)

a) The size of a capacitor increase
b) Voltage rating of the capacitor increases
c) Microfarad rating of the capacitor increases
d) None of the above

Ans: (b)

a) True
b) False

Ans: (b)

a) To reach the final steady temperature if the initial rate of increase of temperature were maintained constant
b) To reach 63% of fined steady temperature
c) To reach 86.6% of final steady temperature
d) To reach 37% of final steady temperature

Ans: (a)

a) True
b) False

Ans: (b)

a) 0.5 × 108/64 gm
b) 0.5 × 64/108 gm
c) 0.5 × 108/32 gm
d) 0.5 × 32/108 gm

Ans: (c)

a) To get accurate measurement
b) To avoid excessive current in the primary
c) To avoid the risk of high voltage because the unopposed primary m.m.f. will set up an abnormally high flux in the core which produces excessive core less with high heating and a high voltage across the secondary of the transformer
d) Because the current in the primary is not determined by load in primary

Ans: (b)

a) True
b) False

Ans: (b)

Related topics :