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Electromagnetic Waves

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Displacement Current

Subtopic

Displacement Current under Electromagnetic Waves for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a circuit containing a capacitor being charged by a DC source, the displacement current exists:

    A.

    Only in the connecting wires

    B.

    Only in the space between the capacitor plates

    C.

    Both in the wires and between the plates

    D.

    Nowhere in the circuit

  2. 2.

    According to Maxwell's theory, the displacement current IdI_d is mathematically expressed as:

    A.

    Id=μ0dΦEdtI_d = \mu_0 \frac{d\Phi_E}{dt}

    B.

    Id=ϵ0dΦBdtI_d = \epsilon_0 \frac{d\Phi_B}{dt}

    C.

    Id=1ϵ0dΦEdtI_d = \frac{1}{\epsilon_0} \frac{d\Phi_E}{dt}

    D.

    Id=ϵ0dΦEdtI_d = \epsilon_0 \frac{d\Phi_E}{dt}

  3. 3.

    The S.I. unit of displacement current is the same as that of:

    A.

    Electric potential

    B.

    Magnetic flux

    C.

    Conduction current

    D.

    Capacitance

Download the worksheet for Electromagnetic Waves - Displacement Current to practice offline. It includes additional chapter-level practice questions.

Electromagnetic Spectrum and Characteristics

Subtopic

Electromagnetic Spectrum and Characteristics under Electromagnetic Waves for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a plane electromagnetic wave propagating along the z-axis, the direction of the electric field E⃗\vec{E} and magnetic field B⃗\vec{B} are such that the direction of wave propagation is given by:

    A.

    E⃗×B⃗\vec{E} \times \vec{B}

    B.

    B⃗×E⃗\vec{B} \times \vec{E}

    C.

    Along the direction of E⃗\vec{E} only

    D.

    Along the direction of B⃗\vec{B} only

  2. 2.

    Which of the following components of the electromagnetic spectrum possesses the shortest wavelength?

    A.

    Radio waves

    B.

    Visible light

    C.

    Gamma rays

    D.

    Infrared radiation

  3. 3.

    According to Maxwell's theory, the fundamental source of an electromagnetic wave is:

    A.

    A charge moving with constant velocity

    B.

    A static electric charge

    C.

    An accelerated or oscillating charge

    D.

    A magnetic dipole at rest

Download the worksheet for Electromagnetic Waves - Electromagnetic Spectrum and Characteristics to practice offline. It includes additional chapter-level practice questions.

Electromagnetic Waves - Class 12 Physics (ICSE) | Krit.club