The direction of propagation of an electromagnetic waves is

  1. Home
  2. Back

Question:
 The direction of propagation of an electromagnetic waves is

1.Perpendicular to electric field

2. Perpendicular to both electric and magnetic field

3.Perpendicular to magnetic field

4.Parallel to electric and magnetic field

Posted Date:-2021-08-31 09:36:31

More MCQS Questions and answers

  1. A 100?F capacitor with 12V source in series having frequency 50Hz will offer a capacitive reactance of about
  2. A 10? electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element?
  3. a voltage V = V? cos ?t is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by
  4. Choose the correct statement. In the case of AC circuit ohms law holds for
  5. If capacitance of L-C circuit is made four times then frequency of the circuit becomes
  6. In an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then
  7. In capacitive circuit the current
  8. pure resistor circuit the voltage and current are
  9. The value of the steady current which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current is
  10. To find the r.m.s value of an alternating current mathematically we need to have
  11. What is the self inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1?
  12. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be
  13. A changing magnetic flux produces around itself an induced
  14. A choke is used as a resistance in
  15. A pure variable resistor is connected in series with a pure capacitor of fixed capacitance. The impedance of the circuit
  16. A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is
  17. An alternating current of r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing 10? resistor. The peak current is then
  18. An alternating current or voltage
  19. An alternating potential difference is connected across a pure resistor and the frequency of the supply is varied but the rms value of the voltage is kept constant. The mean rate of heat dissipated from the resistor is
  20. An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is
  21. At resonance the value of the power factor in an L-C-R series circuit is
  22. Electromagnetic waves emitted from antenna are
  23. Electromagnetic waves transport
  24. Electromagnetic waves travel in free space with the speed of
  25. The direction of propagation of an electromagnetic waves is
  26. Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in
  27. A capacitor of capacitance 30?F is charged by a constant current of 10mA. If initially the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V?
  28. Ammeter connected in an AC circuit measures
  29. An A.C series circuit containing 4? resistance and 3-? inductive reactance. The impedance of the circuit is
  30. An alternating current is represented by the equation I = I?sin?t which of the following equation represents an alternating current of frequency and amplitude twice that of the above current?
  31. An electromagnetic wave consists of
  32. An inductive coil has a resistance of 100?. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45?. What is the inductance of the coil?
  33. An inductor may store energy in
  34. If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb
  35. Mark the wrong statement.
  36. The frequency of a circuit consisting of a capacitance C and a resistor R is
  37. The phase angle between the voltage and the current in an AC circuit consisting of a resistance is
  38. The relativistic energy E is equivalent to relativistic mass given by
  39. Tick the correct statement
  40. Waves emitted from the antenna are
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!