1
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
An inductor designed with $$400$$ turns coil wound on an iron core of $$16\,\,c{m^2}$$ cross sectional area and with a cut of an air gap length of $$1$$ $$mm$$. The coil is connected to a $$230$$ $$V,$$ $$50$$ $$Hz$$ ac supply. Neglect coil resistance, core loss, iron reluctance and leakage inductance. $$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}\,H/m} \right)$$

The average force on the core to reduce the air gap will be

A
$$832.29$$ $$N$$
B
$$1666.22$$ $$N$$
C
$$3332.47$$ $$N$$
D
$$6664.84$$ $$N$$
2
GATE EE 2001
MCQ (Single Correct Answer)
+2
-0.6
The conductors of a $$10$$ $$km$$ long, single phase, two wire line are separated by a distance of $$1.5$$ $$m.$$ The diameter of each conductor is $$1$$ $$cm.$$ If the conductors are of copper, the inductance of the circuit is
A
$$50.0$$ $$mH$$
B
$$45.3$$ $$mH$$
C
$$23.8$$ $$mH$$
D
$$19.6$$ $$mH$$
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