Show:
FORCE AND PRESSURE
FRICTION
SOUND
CHEMICAL EFFECTS OF ELECTRIC CURRENT
SOME NATURAL PHENOMENA
100

Opening the door is an example of which type of force?
(a) contact force
(b) spring force
(c) non-contact force
(d) magnetic force

(a) contact force

100

Which of the following uses spikes in shoes?

  1. Lawyer
  2. Doctor
  3. Rugby player
  4. Painter

(c) Rugby player

100

What is the speed of sound in air?

  1. 110 m/s
  2. 220 m/s
  3. 330 m/s
  4. 440 m/s
  • 330 m/s
100
  1. Which of the following is an insulator?

(a) Human body

(b) Graphite

(c) Pure water

(d) Copper

Pure water

100

 Name the resin which produces spark is

        a. Gum

        b. Amber

        c. Both a and b

        d. None of these

Amber

200

The pressure on an object _______ with the increase in altitude  from earth surface
(a) Increase
(b) decrease
(c) same
(d) None

(b) decrease

200

Mobil oil is used in scooters and bikes for which purpose?

  1. As fuel
  2. For reducing friction
  3. For increasing friction
  4. None of the above

(b) For reducing friction

200

What is the loudness of normal breathing?

  1. 10 dB
  2. 20 dB
  3. 30 dB
  4. 40 dB

10 db

200
  1. In electroplating, the object to be electroplated is made:

(a) anode

(b) cathode

(c) none

(d) both

anode

200

When a glass rod is rubbed with a piece of silk cloth the rod

(a) and the cloth both acquire positive charge.

(b) becomes positively charged while the cloth has a negative charge.

(c) and the cloth both acquire negative charge.

(d) becomes negatively charged while the cloth has a positive charge.

(b) The rod becomes positively charged, while the cloth has a negative charge.

300

Name the force used in removing iron scrap from a heap of mixed scrap.
(a)  Magnetic Force
(b) Electrostatic force
(c) Gravitational force
(d) Friction Force

(a) Magnetic Force

300

Tyres of which vehicles are biggest treads among the following?

  1. Race car
  2. Car
  3. Motorbike
  4. Excavator

(d) Excavator

300

What is the length of vocal cords in men?

  1. 5 mm
  2. 10 mm
  3. 15 mm
  4. 20 mm

20mm

300
  1. The extraction of metals from their ores by electrolysis is called:

(a) electroplating

(b) electrometallurgy

(c) electrorefining

(d) none

none

300

he lightning conductor was first established by a scientist named:-

(a) Issac Newton

(b) Benjamin Franklin

(c) Robert Hooke

(d) Thales

Benjamin Franklin

400

Which of the following is an example of a non-contact force?
(a) The force exerted by us to lift a bucket
(b) push a stationary car
(c) The force exerted by magnets
(d) Force due to friction

(c) The force exerted by magnets

400

 Which of the following is used in powdered form as lubricant?

  1. Graphite
  2. Chalk
  3. Salt
  4. Sugar
  • Graphite
400

A vibrating body should oscillate minimum how many times per second to make an audible sound for humans?

  1. 10 times
  2. 20 times
  3. 30 times
  4. 40 times
  • 20 times
400
  1. The refining or purification of metals by passing electric current is called:

(a) electroplating

(b) electrolysis

(c) electrorefining

(d) none

electroplating

400

The magnitude of an earthquake is measured on the:

(a) Celsius scale

(b) Decibel scale

(c) Kelvin scale

(d) Richter scale

Richter scale

500

A ball rolling on the ground slows down and finally stops because
(a) force
(b) less force applied
(c) friction
(d) none of the above

 (c) friction

500

Least amount of friction is required in which of the following sports?

  1. Car Race
  2. Football
  3. Ice Skating
  4. Tug of war
  • Ice Skating
500

Which of the following produces noise only?

  1. Jet engine
  2. Harmonium
  3. Flute
  4. Guitar
  • Jet engine
500
  1. Carbon rods, used as electrodes are made up of:

(a) graphite

(b) wood

(b) iron

(d) diamond

graphite

500

The SI unit of electric charge is:

(a) watt

(b) joule

(c) coulomb

(d) ampere

coulomb