Q. Measure the inductance (L) having high value, which bridge can be used ?
  • (A) Maxwell bridge
  • (B) Maxwell Wein bridge
  • (C) Wheatstone bridge
  • (D) Hay's Bridge
💬 Discuss
✅ Correct Answer: (D) Hay's Bridge
Q. Name the bridge used for measuring low resistance ?
  • (A) Maxwell's bridge method
  • (B) Kelvin's double bridge method
  • (C) Potentiometer method
  • (D) Wheatestone bridge method
💬 Discuss
✅ Correct Answer: (B) Kelvin's double bridge method
Q. Which one of the following types of noise gains importance at high frequency ?
  • (A) Shot noise
  • (B) Random noise
  • (C) Impulse noise
  • (D) Transit-time noise
💬 Discuss
✅ Correct Answer: (D) Transit-time noise
Q. Intrinsic impedance of free space is given as ?
  • (A) 75
  • (B) 73
  • (C) 377
  • (D) 300
💬 Discuss
✅ Correct Answer: (D) 300
Q. A coaxial transmission line carrying an RF signal is perfectly method to the load. Consider the cross-section of the line, at a plane where the instantaneous voltage is at its maximum value. How will the curl of the E-field very over this cross-section ?
  • (A) Increases from the center to the outer conductor
  • (B) Decreases from the center to the outer conductor
  • (C) Zero everywhere
  • (D) Constant value proportional to the RF voltage
💬 Discuss
✅ Correct Answer: (D) Constant value proportional to the RF voltage
Q. Equalizing in TV are sent during ?
  • (A) Horizontal blanking
  • (B) Vertical blanking
  • (C) Serrations slots
  • (D) The horizontal retrace
💬 Discuss
✅ Correct Answer: (B) Vertical blanking
Q. The electric field measured in the far field of an antenna at a distance of 50m is 1V/m. the average power density at a distance of 500 mC from the antenna is ?
  • (A) 26.6
  • (B) 0.1
  • (C) 10
  • (D) 13.3
💬 Discuss
✅ Correct Answer: (A) 26.6
Q. Ratio of skin depths of an Electromagnetic wave inside the conductor for the corresponding frequencies at GHz and 9 GHz, considering the same material properties for both the frequencies is ?
  • (A) 9 : 4
  • (B) 4 : 9
  • (C) 3 : 2
  • (D) 2 : 3
💬 Discuss
✅ Correct Answer: (C) 3 : 2
Q. The standard IF value for AM receiver is ?
  • (A) 107 KHz
  • (B) 455 MHz
  • (C) 455 KHz
  • (D) 10.7 MHz
💬 Discuss
✅ Correct Answer: (C) 455 KHz
Q. In a super heterodyne receiver ?
  • (A) The IF stage has better selectivity than RF stage
  • (B) The RF stage has better selectivity than IF stage
  • (C) The RG stage has same selectivity than IF stage
  • (D) None of the other options
💬 Discuss
✅ Correct Answer: (A) The IF stage has better selectivity than RF stage

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