Mechanics
Units & Measurement and Dimensions
MCQ (Single Correct Answer)
Motion in a Straight Line
MCQ (Single Correct Answer)
Work, Energy and Power
MCQ (Single Correct Answer)
Center of Mass and Collision
MCQ (Single Correct Answer)
Simple Harmonic Motion
MCQ (Single Correct Answer)
Heat and Thermodynamics
MCQ (Single Correct Answer)
Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following radiations of electromagnetic waves has the highest wavelength ?

A
UV-rays
B
IR-rays
C
Microwaves
D
X-rays
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Suppose that the electric field amplitude of electromagnetic wave is $$E_0=120 \mathrm{~NC}^{-1}$$ and its frequency $$f=50 \mathrm{~MHz}$$. Then, which of the following value is incorrectly computed?

A
Magnetic field amplitude is $$400 \mathrm{nT}$$.
B
Angular frequency of EM wave is $$\pi \times 10^8 \mathrm{rad} / \mathrm{s}$$.
C
Propagation constant (angular wave number) is $$2.1 \mathrm{~rad} / \mathrm{m}$$.
D
Wavelength of EM wave is $$6 \mathrm{~m}$$.
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The source of electromagnetic wave can be a charge

A
moving with a constant velocity
B
moving in a circular orbit
C
at rest
D
moving parallel to the magnetic field
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

A light beam of intensity $$20 \mathrm{~W} / \mathrm{cm}^2$$ is incident normally on a perfectly reflecting surface of sides $$25 \mathrm{~cm} \times 15 \mathrm{~cm}$$. The momentum imparted to the surface by the light per second is

A
$$2 \times 10^{-5} \mathrm{~kg}-\mathrm{ms}^{-1}$$
B
$$1 \times 10^{-5} \mathrm{~kg}-\mathrm{ms}^{-1}$$
C
$$5 \times 10^{-5} \mathrm{~kg}-\mathrm{ms}^{-1}$$
D
$$1.2 \times 10^{-5} \mathrm{~kg}-\mathrm{ms}^{-1}$$
KCET Subjects