List of top Questions asked in Tamil Nadu Common Entrance Test

A slab of insulating material 130 cm\(^2\) in area and 1 cm thick is to be heated by dielectric heating. The power required is 380 W at 30 MHz. The material has a relative permittivity of 5 and a power factor of 0.05. Determine the necessary voltage.
Four identical alternators each rated for 20 MVA, 11 kV having a sub-transient reactance of 16% are working in parallel. The short circuit level at the bus bars is:
Spot welding is used for:
Surge impedance of a lossless transmission line is (if \( L \) = inductance/m and \( C \) = capacitance/m):
SVC is basically:
The 8051 program segment, which performs ‘software polling’ to check if the Timer-0 counting has completed, is:
H in the region \( 0 \leq l \leq a \) for an infinitely long co-axial transmission line is:
The breakdown strength of air for small gaps (1 mm) under uniform field condition and standard atmospheric conditions will be:
Which of the following justifies the linearity property of the \( z \)-transform? \( x(n) \leftrightarrow X(z) \).

The direction of current flow in the circuit is such that the induced magnetic field produced by the induced current will oppose the original magnetic field. This is:

The duty cycle value of a buck converter when the switching frequency is 250 kHz and the ON time is 2\( \mu s \) is:

The electromagnetic wave propagates in free space with a speed of:

A system has two zeros and four poles. Then two asymptotes in the root loci plane move towards infinity along:

The flux set up by the armature current, which does not cross the air gap and takes a different path, is called:

Candela is the unit of:
The Impulse Response of an initially relaxed linear system is \( e^{-2t}u(t) \). To produce a response of \( te^{-2t}u(t) \), the input should be:
A single-phase inverter has a square wave output voltage. The percentage of the fifth harmonic component in relation to the fundamental component is:
If all the poles of \( H(z) \) are outside the unit circle, then the system is said to be:

A transformer steps up the voltage by a factor of 100. The ratio of current in the primary to that in the secondary is:

Which of the following motors is expected to have maximum full-load efficiency?
The most important test to assert the proper functions of a surge diverter is:

The motion of electrons in a CRT is due to:

The nuclear plants are suitable for:

The output of the following 8051 Assembly code is: 

The output of the following program is: