1
GATE EE 2004
+2
-0.6
The core flux in the $$CT$$ of above problem under the given operating condition is
A
$$0$$
B
$$45.0\,\mu \,$$Wb
C
$$22.5$$ mWb
D
$$100.0$$ mWb.
2
GATE EE 2004
+2
-0.6
A $$CRO$$ probe has an impedance of $$500k\Omega$$ in parallel with a capacitance of $$10pF$$. The probe is used to measure the voltage between $$P$$ and $$Q$$ as shown in Fig. The measured voltage will be A
$$3.53$$$$V$$
B
$$4.37V$$
C
$$4.54V$$
D
$$5.00V$$
3
GATE EE 2004
+2
-0.6
The armature resistance of a permanent magnet dc motor is 0.8 $$\Omega$$. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A form the same source will be
A
48.0%
B
57.1%
C
59.2%
D
88.8%
4
GATE EE 2004
+2
-0.6
A 8 pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is
A
96V
B
192V
C
384V
D
768V
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