JAMB Physics Past Questions & Answers - Page 6

\(V_L\)=60 V ,\(V_C\) = 120 V ,  \(V_R\) =30V
 

;V = ?

; \(V^2\) = \(V_R^2\) +  \(V_L\) -  \(V_C^2\)

= \(V^2\) = \(30^2\)  + \(60 - 120^2\)

= \(V^2\)  = 900 + 3600

= \(V^2\)  = 4500

=  V =  √4500 = 67V

An incandescent light source is a type of light source that produces light by heating a material until it glows. The material that is heated is usually a metal, such as tungsten. Fluorescent lamps, LED lamps, and neon lamps are all examples of non-incandescent light sources.

Fluorescent lamps produce light by passing an electric current through a gas, which causes the gas to emit ultraviolet light. The ultraviolet light then causes a coating on the inside of the lamp to fluoresce, which produces visible light.

LED lamps produce light by passing an electric current through a semiconductor material, which causes the material to emit photons. The photons then produce visible light.

Neon lamps produce light by passing an electric current through a gas, which causes the gas to emit visible light.

The working of the beam balance is based on the principle of moments. The principle of moments states that the sum of the clockwise moments on a beam must be equal to the sum of the counterclockwise moments on the beam. This means that the weight of the object on the left side of the beam must be multiplied by the distance from the fulcrum to the left side of the beam, and the weight of the object on the right side of the beam must be multiplied by the distance from the fulcrum to the right side of the beam. If these two products are equal, then the beam will be in equilibrium.

Mechanics is the branch of physics that deals with the motion of objects and the forces acting on them. It is the foundation of all other branches of physics, and it is used to study everything from the motion of planets to the motion of electrons.

q=\(4.6 × 10^{-5}\), C=   \(3.2 × 10^4\) \(Vm^{-1}\) F= ?

F=qE

⇒ \(4.6 × 10^{-5}\)C × \(3.2 × 10^4\)

; F= 1.5 N