Question:
The ratio of electric field amplitudes and magnetic field amplitudes in an electromagnetic wave in vacuum is equal to:
The ratio of electric field amplitudes and magnetic field amplitudes in an electromagnetic wave in vacuum is equal to:
Show Hint
For electromagnetic waves:
\[
\frac{E_0}{B_0}=c
\]
where:
\[
c=\text{speed of light in vacuum}
\]
Updated On: May 21, 2026
- Speed of light
- Planck's constant
- Gravitational constant
- Permittivity of vacuum
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
For an electromagnetic wave in vacuum:
\[
\frac{E_0}{B_0}=c
\]
where:
• \(E_0\) = amplitude of electric field
• \(B_0\) = amplitude of magnetic field
• \(c\) = speed of light in vacuum
Step 1: Recall the relation
Electromagnetic waves consist of:
• Oscillating electric field
• Oscillating magnetic field The ratio of their amplitudes is always: \[ c=3\times10^8\ \text{m s}^{-1} \]
Step 2: Identify the correct option
Thus: \[ \frac{E_0}{B_0} = \text{Speed of light} \] Option analysis:
• Option (A): Correct
• Option (B): Incorrect
• Option (C): Incorrect
• Option (D): Incorrect Therefore: \[ \boxed{\text{(A)}} \]
• \(E_0\) = amplitude of electric field
• \(B_0\) = amplitude of magnetic field
• \(c\) = speed of light in vacuum
Step 1: Recall the relation
Electromagnetic waves consist of:
• Oscillating electric field
• Oscillating magnetic field The ratio of their amplitudes is always: \[ c=3\times10^8\ \text{m s}^{-1} \]
Step 2: Identify the correct option
Thus: \[ \frac{E_0}{B_0} = \text{Speed of light} \] Option analysis:
• Option (A): Correct
• Option (B): Incorrect
• Option (C): Incorrect
• Option (D): Incorrect Therefore: \[ \boxed{\text{(A)}} \]
Was this answer helpful?
0
0
Top CUET Physics Questions
- 10 resistors, each of resistance R are connected in series to a battery of emf E and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased n times. The value of n is:
- An infinitely long wire is charged uniformly with a charge density λ and placed in the air, the electric field at a distance r from the wire will be:
- Two point charges (-q) and (+4q) are placed at that separation ‘r’. Where should a third charge be placed so that the entire system of charges becomes in equilibrium?
- A conducting sphere is charged. If the electric field at a distance of 20 cm from the center of this sphere is 1.2x103NC-1 and points radially inward, the net charge on this sphere is
- A parallel plate capacitor having cross-sectional area ‘A’ and separated by distance ‘d’ is filled by a copper plate of thickness b. its capacitance is :
View More Questions
Top CUET Electromagnetic Waves Questions
- Which of the following statement is not true for the electromagnetic waves?
- A vertical electric field of magnitude 4.9×105 NC-1 just prevents a water droplet of mass 0.1 g from falling. What is the charge on the droplet? Take acceleration due to gravity 9.8 ms-2.
- Which of the following choices correctly sequences the designated segments of the electromagnetic wave spectrum in an increasing order of their respective photon energies?
- The electric and magnetic field vectors of a plane electromagnetic wave propagating along the positive x-axis are represented by \( \vec{E} \) and \( \vec{B} \) respectively. Which of the following vector expressions correctly defines the direction of propagation of this wave?
- Two long, straight parallel wires separated by a distance \( r \) carry steady currents \( I_1 \) and \( I_2 \) in the exact same direction. What type of magnetic force interaction do they experience?
View More Questions
Top CUET Questions
Select the statements that are CORRECT regarding patterns of biodiversity.
(A) Species diversity increases as we move away from the equator towards the poles(B) The tropical Amazon rain forest in South America has the greatest biodiversity on earth.(C) There is more solar energy available in the temperate region than tropics.(D) Tropical environments are less seasonal relatively more constant and predictableWhich of the following hormone is not produced by placenta ?
- Individuals with karyotype of 44+XXY having overall masculine development with few feminine development like Gynaecomastia has _______ chromosomal disorder.
- Match List - I with List - II.Choose the correct answer from the options given below :
List - I
List - II
A Streptokinase I Blood-Cholestrol lowering agents B Cyclosporin II Clot Buster C Statins III Propionibacterium sharmanii D Swiss Cheese IV Immuno suppressive agent Which of the following option determines percolation and water holding capacity of soils ?
View More Questions