Science Class 8th
361. The_____ devices convert electrical energy into other forms of energy.
A) Input
B) Output
C) Processors
D) None of the these
362. Wind power is the type of electric generation in which _____ is used:
A) Power of wind
B) Power of water
C) Power of nuclear
D) Power of electricity
363. In hydro power, ____ is used to run turbines.
A) Moving water
B) Electrical energy
C) Wind energy
D) Heat energy
364. The general generator works on the principle of
A) Electrostatic
B) Electromagnetic induction
C) Magnetism
D) Electromagnetism force
365. Dynamo is a kind of ____
A) Mechanical device
B) Chemical device
C) Electrical generator
D) None of the above
366. In the dry cell, zinc acts as :
A) Positive electrode
B) Negative electrode
C) Electrolyte
D) Centre rod
367. There is no force of gravity in ____
A) Atmosphere
B) Ozone layer
C) Space
D) None of the above
368. A telescope is an instrument designed for the observation of _____ object.
A) Distant
B) Near
C) Large
D) Small
369. Telescope was invented in ______ century.
A) 17th
B) 18th
C) 15th
D) 16th
370. _____telescope gathers and focuses radiation mainly from the visible part of the electromagnetic spectrum.
A) Refractor
B) Optical
C) Reflector
D) Radio