1
GATE EE 2010
+2
-0.6
The Maxwell's bridge shown in the fig. is at balance, the parameters of the inductive coil are
A
$$R = {{{R_2}{R_3}} \over {{R_4}}}\,\,\,\,L = {C_4}{R_2}{R_3}$$
B
$$L = {{{R_2}{R_3}} \over {{R_4}}}\,\,\,\,R = {C_4}{R_2}{R_3}$$
C
$$R = {{{R_4}} \over {{R_2}{R_3}}}\,\,\,\,L = {1 \over {{C_4}{R_2}{R_3}}}$$
D
$$L = {{{R_4}} \over {{R_2}{R_3}}}\,\,\,\,R = {1 \over {{C_4}{R_2}{R_3}}}$$
2
GATE EE 2010
+1
-0.3
A wattmeter is connected as shown in the fig. the wattmeter reads
A
zero always
B
Total power consumed by $${Z_1}$$ & $${Z_2}$$
C
Power consumed by $${Z_1}$$
D
Power consumed by $${Z_2}$$
3
GATE EE 2010
+2
-0.6
A separately excited DC motor runs at 1500 rpm under no-load with 200 V applied to the armature. The field voltage is maintained at its rated value. The speed of the motor, when it delivers a torque of 5 Nm, is 1400 rpm as shown in the figure. The rotational losses and armature reaction are neglected. For the motor to deliver a torque of 2.5 Nm at 1400 rpm the armature voltage to be applied is
A
125.5 V
B
193.3 V
C
200 V
D
241.7 V
4
GATE EE 2010
+2
-0.6
A separately excited DC motor runs at 1500 rpm under no-load with 200 V applied to the armature. The field voltage is maintained at its rated value. The speed of the motor, when it delivers a torque of 5 Nm, is 1400 rpm as shown in the figure. The rotational losses and armature reaction are neglected. The armature resistance of the motor is,
A
$$2\;\Omega$$
B
$$3.4\;\Omega$$
C
$$4.4\;\Omega$$
D
$$7.7\;\Omega$$
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