BHEL SUPERVISOR TRAINEE QUESTION PAPER PDF

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Z0 tan h. ROM c. PROM d. Volatile memory The rise time of the RC network shown in the given figure is approximately equal to — b. Electric field potential b. Potential c. Charge d. None of the above The electric field line and equipotential lines- a. Are parallel to each other b. Are one and same c. Cut each other orthogonally d.

Can be inclined to each other at any angle For a lossy transmission line short circuited at the receiving end, the input impedance is given by When Z0 is the characteristic impendence g is the propagation constant and L is the length of the line When two equal positive point charges are placed along X- axis at X1 and —X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed- a.

In the —x direction c. In the —y direction The directions of in TEM mode transmission line with respect to the direction of propagation are- a. Both are transverse to the direction of propagation b.

TM01 c. TM d. When a dipole antenna was radiating with some excitation in free space radiating a certain amount of the power v if then this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, then the radiated power with the same excitation will be a.

Decrease to finite non-zero value b. Remain the same c. Increase d. A short — circuited stub at the load b. An inductance at the load c. A short circuited stub at a specific distance from the load d. When a signal of 10 mV at 75 MHz is to be measured then which of the following instruments can be used —a.

Cathode ray oscilloscope c. Moving iron voltmeter d. Digital multimeter Which of the following statement is true about two wattmeter method for power measurement in three phase current? PPM pulse position modulation b. PAM pulse amplitude modulation c. PCM pulse code modulation d. PDM pulse duration modulation Radiation pyrometers are used for the measurement of temperature in the range of — a.

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