Mushkovic PHYSICS   -   Physics

In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.

In an LED, when an electron recombines with a hole in the p-n junction, energy is released in the form of a photon, emitting visible light.
Mushkovic PHYSICS   -   Physics

The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s __________ rule.

Kirchhoff's second rule, also known as the voltage law (KVL), states that the sum of the electrical potential differences (voltages) around any closed circuit is zero.
Mushkovic PHYSICS   -   Physics

Which of the following lights travels the fastest in optical fibres?

Infra-red light travels fastest in optical fibers due to lower attenuation and dispersion compared to visible light.
Mushkovic PHYSICS   -   Physics

A standing wave pattern is formed when the length of string is an integral multiple of __________ wavelength.

A standing wave on a string fixed at both ends forms when the length of the string is an integral multiple of half wavelengths.
Mushkovic PHYSICS   -   Physics

Tuning of the radio is the best example of electrical __________

Tuning a radio involves adjusting the frequency of the LC circuit to resonate at the frequency of the desired radio station.
Mushkovic PHYSICS   -   Physics

A disc at rest without slipping, rolls down a hill of height (3 x 9.8) m. What is its speed in m/sec when it reaches at the bottom?

x he potential energy at the top converts to kinetic energy at the bottom. Using energy conservation: mgh = 1/2mv2. v = /2gh and h = 3 x 9.8 = 29.4 m and then v = /2 x 9.8 x 29.4 ~~ 11.4 m / s
Mushkovic PHYSICS   -   Physics

The force required to bend the normally straight path of a particle into a circular path is called __________ force.

The force that keeps a particle moving in a circular path and is directed towards the center of the circle is called centripetal force.
Mushkovic PHYSICS   -   Physics

The vertical velocity of ball thrown upward __________ with time.

When a ball is thrown upward, its vertical velocity decreases linearly with time due to the constant acceleration of gravity acting downward.
Mushkovic PHYSICS   -   Physics

__________ are the particles that experience strong nuclear force.

Particles that experience the strong nuclear force are nucleons, i.e., protons and neutrons. This force binds the nucleus together.
Mushkovic PHYSICS   -   Physics

For atomic hydrogen spectrum, which of the following series lies in visible region of electromagnetic spectrum?

The Balmer series of the hydrogen spectrum lies in the visible region. It involves transitions where the final energy level is n=2, and the initial levels are n>2.

PHYSICS