1
GATE EE 2011
MCQ (Single Correct Answer)
+1
-0.3
A dual trace oscilloscope is set to operate in the ALTernate. The control input of the multiplexer used in the y-circuit is fed with a signal having a frequency equal to
A
the highest frequency that the multiplexer can operate properly
B
twice the frequency of the time base (sweep) oscillator
C
the frequency of the time base (sweep) oscillator
D
half the frequency of the time base (sweep) oscillator
2
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A $$4\,{1 \over 2}$$ digit $$DMM$$ has the error specification as $$0.2$$% of reading $$+10$$ counts. If a dc voltage of $$100$$ $$v$$ is read on its $$200$$ $$V$$ full scale. The maximum error that can be expressed in the reading is _______.
A
$$ \pm \,\,0.1\% $$
B
$$ \pm \,\,0.2\% $$
C
$$ \pm \,\,0.3\% $$
D
$$ \pm \,\,0.4\% $$
3
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
The direct axis and quadrature axis reactances of a salient pole alternator are $$1.2$$ $$p.u$$ and $$1.0$$ $$p.u$$ respectively. The armature resistance is negligible. If this alternator is delivering rated $$kVA$$ at $$upf$$ and at rated voltage then its power angle is
A
$${30^ \circ }$$
B
$${45^ \circ }$$
C
$${60^ \circ }$$
D
$${90^ \circ }$$
4
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A three-phase 440V, 6 pole, 50Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field to rotor magnetic field and speed of rotor with respect to stator magnetic field are
A
zero, 50 rpm
B
zero, 955 rpm
C
1000 rpm, -5 rpm
D
1000 rpm, 955 rpm
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