1
GATE EE 1998
+2
-0.6
Match the following

List-I (Test)
(A) No load and blocked rotor test
(B) Sumpner’s test
(C) Swinburn’s test

List-II (Machine)
(1) Transformer
(2) Induction machine
(3) Synchronous machine
(4) DC machine

A
$$\begin{array}{l}A\;\;\;B\;\;\;C\\2\;\;\;\;1\;\;\;\;4\end{array}$$
B
$$\begin{array}{l}A\;\;\;B\;\;\;C\\1\;\;\;\;2\;\;\;\;4\end{array}$$
C
$$\begin{array}{l}A\;\;\;B\;\;\;C\\4\;\;\;\;3\;\;\;\;1\end{array}$$
D
$$\begin{array}{l}A\;\;\;B\;\;\;C\\4\;\;\;\;1\;\;\;\;3\end{array}$$
2
GATE EE 1998
+1
-0.3
The laws of electromagnetic induction (Faraday's and Lenz's law) are summarized in the following equation:
A
e = iR
B
$$\mathrm e\;=\;\mathrm L\frac{\operatorname d\mathrm i}{\operatorname d\mathrm t}$$
C
$$\mathrm e\;=\;-\frac{\operatorname d\mathrm\psi}{\operatorname d\mathrm t}$$
D
none of these
3
GATE EE 1998
+1
-0.3
The efficiency of a 100 kVA transform is 0.98 at full as well as at half load. For this transformer at full load the copper loss.
A
is less than core loss
B
is equal to core loss
C
is more than core loss
D
none of the above
4
GATE EE 1998
+1
-0.3
The magnetizing current in a transformer is rich in
A
3rd harmonic
B
5th harmonic
C
7th harmonic
D
13th harmonic
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