Which of the following is NOT a component of a slide projector?
Concave mirror
Condenser
Convex mirror
light source
Screen
Correct answer is A
You will find convex lenses in telescopes, microscopes, magnifying glasses, cameras, slide and movie projectors, and other instruments that use light to create an image
590N
500N
450N
350N
180N
Correct answer is D
No explanation has been provided for this answer.
Radio receivers are tuned using
electromagnets
electric motors
Inductors
variable capacitors
variable resistors
Correct answer is D
No explanation has been provided for this answer.
An electric motor primary converts
electrical energy to chemical energy
electrical energy to heat energy
electrical energy to mechanical energy
mechanical energy to electrical energy
mechanical energy to light energy
Correct answer is C
No explanation has been provided for this answer.