List of top Physics Questions on Electromagnetic Wave asked in UP Board XII

Equation of electric field of a plane electromagnetic wave is given as:
\[ E_z = 60 \sin(500x + 1.5 \times 10^{11} t) \, \text{V/m}. \] Write the equation for the magnetic field of the wave.

What are the electromagnetic waves? Write down its characteristics.

Equation of electric field of a plane electromagnetic wave is given as:
\[ E_z = 60 \sin(500x + 1.5 \times 10^{11} t) \, \text{V/m}. \] Write the equation for the magnetic field of the wave.

What are electromagnetic waves? Give a brief description of the main properties of electromagnetic waves. The equation for oscillation of the magnetic field of an electromagnetic wave is \( B_y = 8 \times 10^{-6} \sin \left( 2 \times 10^{11} t + 300 \pi x \right)~\text{T \). Find the wavelength and equation for the oscillating electric field. Mention the direction of propagation of the wave also.}

1 GHz frequency corresponds to which region of the electromagnetic spectrum?

What is meant by displacement current? The amplitude of electric field of an electromagnetic wave is \( E_0 = 120 \, \text{N/C} \) and frequency is \( \nu = 50 \, \text{MHz} \). Find out:
i) Amplitude of the magnetic field \( B_0 \) ii) Wavelength \( \lambda \) of the electromagnetic wave.

The amplitude of electric field vector of a plane electromagnetic wave is \(E_0 = 150\) N/C and frequency \(\nu = 50\) MHz. Find out
(i) Amplitude of magnetic field (\(B_0\))
(ii) Angular frequency (\(\omega\))
(iii) Wavelength (\(\lambda\))

What is meant by 'displacement current' and write modified equation of Ampere's law.

A free electron is placed in the path of a plane electromagnetic waves. The electron will start moving

The frequency range of ultraviolet radiation in electromagnetic radiation spectrum is

What is the effect on the capacitance of a parallel plate capacitor when
(i) distance between the plates is doubled.
(ii) area of the plates is halved.
(iii) a dielectric medium is filled between the plates.

What are electromagnetic waves ? By drawing its propagation diagram, show the electric field and magnetic field in it.

Electro-magnetic wave of minimum frequency is :

What are electromagnetic waves? Give a brief description of the main properties of electromagnetic waves. The equation for oscillation of the magnetic field of an electromagnetic wave is \( B_y = 8 \times 10^{-6} \sin \left( 2 \times 10^{11} t + 300 \pi x \right)~T \). Find the wavelength and equation for the oscillating electric field. Mention the direction of propagation of the wave also.

Show the electromagnetic wave by a diagram and write down its three important properties. Which radiation has the least wavelength in the spectrum of electromagnetic waves?

1 GHz frequency corresponds to which region of the electromagnetic spectrum?

What is meant by displacement current? The amplitude of electric field of an electromagnetic wave is \( E_0 = 120 \, \text{N/C} \) and frequency is \( \nu = 50 \, \text{MHz} \). Find out:
i) Amplitude of the magnetic field \( B_0 \) ii) Wavelength \( \lambda \) of the electromagnetic wave.

Explain the difference between self-inductance and mutual inductance. Define the coefficient of self-inductance and coefficient of mutual inductance. A plane coil of area 100 cm$^2$ is rotating in a magnetic field of 2 weber/m$^2$ with angular velocity 20 rad/s. What will be the maximum induced electromotive force in the coil?

Name the waves of longest wavelength and highest frequency in the given electromagnetic waves — microwaves, X-rays, radio waves, and \(\gamma\)-rays. What is meant by displacement current?

On which principle does the transformer work? What are step-up and step-down transformers? Mention two main losses occurring in transformers. In an ideal transformer, the ratio of turns in primary and secondary coils is 10 : 1. Supply in primary is of 220 V and secondary is connected with a resistance of 220 \(\Omega\). Find the value of current flowing in the primary.