List of practice Questions

Which motor is preferred for electric traction purpose?
The value of area under a velocity-time graph is
Which type of load can give load commutation in a single-phase thyristor bridge inverter
The wheels of a train, engine as well as bogies, are slightly tapered to
Calculate the velocity of the bottom point of the wheel for perfect rolling using the data: r = 20 cm, \( \omega = 100 \text{ rad/sec} \)
A train moving at a speed of 63 km/hr enters a railway station and crosses the platform in 20 sec. If the length of the train is 100 m, what is the length of the platform?
In _____ type of modulation method, the pulse width is not equal for all the pulses.
In a single pulse width modulated inverter, to eliminate the third harmonic, pulse width must be
In the rotor voltage injection method, when an external voltage source is in phase with the main voltage then speed will
What is the average value of output of a chopper with duty ratio 0.5 and source voltage of 50V?
In a single-phase full converter, if output voltage has peak and average voltage values of 325V and 133V respectively, then the firing angle is
A single-phase voltage controller has input voltage of 210V and load R = 10 ohm. For 4 cycles on and 5 cycles off, the rms output voltage is
When the gate signal from a thyristor is removed, it will remain in its forward conduction mode. This characteristic of thyristor is called
The shape of the output voltage waveform in a single PWM is
On which of the following does the scale current not depend upon?
In a half wave bridge inverter circuit, the power delivered to the load by each source is given by
Which general register or general register pair of 8085 processor is incremented/decremented by 2 during PUSH and POP instructions?
It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of:
The classic multivibrator circuit is known as:
Which of the following combinations of logic gates can decode binary 1101?
In a Common Collector amplifier, the voltage gain is:
Which filter type is called a flat-flat filter?
The circuits of NOR-based S-R latch are classified as asynchronous sequential circuits, why?
The Darlington pair is mainly used for:
IGBTs are becoming popular due to: