A symmetrical $$400V,$$ $$3$$-$$\phi $$ supply is connected to the network shown in fig. The phase sequence is $$RYB.$$ Find the reading on the wattmeter

$${R_1} = 30\Omega ,\,\,{X_1} = 50\Omega ,\,\,$$ and $${X_2} = 40\Omega $$

Fig. shows the electrostatic vertical deflection system of $$CRT$$. Given that $${V_A}$$ is the accelerating voltage, the deflection sensitivity (deflection/volt) is proportional to

The figure shows input attenuator of a multimeter. The meter reads full-scale with $$12$$ $$V$$ at $$M$$ with the rage switch at position $$B$$ obtain full-scale deflection with the range switch position at $$D?$$

A 240 V d.c. shunt motor with an armature resistance of 0.5 $$\Omega$$ has a full load current of 40 A. Find the ratio of the stalling torque to the full load torque when a resistance of 1 $$\Omega$$ is connected in series with the armature?