# Port of a digital phase meter is shown in the figure, if the input signals are VR (t) = VR sin ω t and VP (t) = VP sin (ω t + 300) the reading of the meter will be

1.  300

2.  3300

3.  1500

4.  2100

4

2100

Explanation :
No Explanation available for this question

# The effective inductance of the circuit across the terminals AB in the Fig. shown below is

1.  9 H

2.  21 H

3.  11 H

4.   6 H

4

11 H

Explanation :
No Explanation available for this question

# A periodic function of half-wave symmetry is necessarily

1.  An even function

2.  An odd function

3.  Neither odd nor function

4.  Both odd and even

4

Neither odd nor function

Explanation :
No Explanation available for this question

# The copper armature winding of a motor is subjected to an operating temperature of 800 C. the room temperature is 200. The percentage change in resistance of the armature winding from cold starting condition to normal running will be nearly

1.  10%

2.  16%

3.  20%

4.  24%

4

20\%

Explanation :
No Explanation available for this question

# Assuming that only the X and Y logic inputs are available and their complements and are not available, what is the minimum number of two-input NAND gates require to implement X ⊕ Y

1.   2

2.  3

3.  4

4.  5

4

5

Explanation :
No Explanation available for this question

# A load that has a resistance of 10 ohms is to be connected to a supply that has constant voltage of 120 volts. If it is desired that the current to the load be varied from 3 to 5 amperes, what are the resistance and the current rating of the series rheostat that permit this variation

1.  5 ohms, 5A

2.  10 ohms, 10A

3.   20 ohms, 10A

4.  20 ohms, 10 A

4

20 ohms, 10A

Explanation :
No Explanation available for this question

# An antenna behaves as a resonant circuit only when its length is equal to

1.  (????/4)

2.  ????/2

3.  (????/2) or its integral multiple

4.  None of these

4

(????/2) or its integral multiple

Explanation :
No Explanation available for this question

# About the Fourier series expansion of periodic function it can be said that

1.  Even functions have only a constant and cosine terms in their Fourier series expansion

2.  Odd functions have only sine terms in their Fourier series expansion

3.  Functions with half-wave symmetry contain only odd harmonics

4.  All of the above

4

Even functions have only a constant and cosine terms in their Fourier series expansion

Explanation :
No Explanation available for this question

# Match the control system components in List-I with their functions in List-II and select the correct answer using the codes given below the lists: Lists – I List – II A. Servo-motor 1. Error detector B. Amplidyne 2. Transducer C. Potentiometer 3. Actuator D. Flapper valve 4. Power amplifier

1.    A  B  C  D  3  1  2  3

2.    A  B  C  D  2  4  1  3

3.    A  B  C  D  4  3  2  1

4.    A  B  C  D  3  4  1  2

4
 A B C D 3 4 1 2

Explanation :
No Explanation available for this question

1.  -2 V

2.  -4 V

3.  2 V

4.  4 V

5.  lenient

6.  handsome

7.  tranquil

8.  mild

9.  308 cm2

10.  462 cm2

11.  1232 cm2

12.  1848 cm2

12