Question 1.
Tungsten is used for the manufacture of the filament of an electric bulb, because
A. It is a good conductor
B. It is economical
C. It is malleable
D. It has a very high melting point
Ans: D. It has a very high melting point
Question 2.
Electromagnet is constructed with which of the following ?
A. Steel
B. Soft Iron
C. Aluminium
D. Nickel
Ans: B. Soft Iron
Question 3.
Which of the following is not a part of a CRT ?
A. Phosphor screen
B. Shadow mask
C. Electron gun
D. Gas plasma
Ans: D. Gas plasma
Question 4.
A wheel-barrow is an example of
A. Class III lever
B. Pulley system
C. Class I lever
D. Class II lever
Ans: D. Class II lever
Question 5.
In a filament type light bulb most of the electric power consumed appears as
A. Visible light
B. Infra-red rays
C. Ultra-violet rays
D. Fluorescent light
Ans: B. Infra-red rays
Question 6.
When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?
A. Nine times
B. Three times
C. Six times
D. One–third
Ans: A. Nine times
Question 7.
Slip rings are usually made of
A. Aluminium
B. Copper
C. Phosphor Bronze
D. Carbon
Ans: C. Phosphor Bronze
Question 8.
A single fixed pulley is used to draw water from a well because
A. Efficiency is 100%
B. Velocity ratio is low
C. Mechanical advantage is high
D. Force is applied in a convenient direction
Ans: D. Force is applied in a convenient direction
Question 9.
Which of the following metals is used for the manufacture of heating elements provided in electric iron ?
A. Nickel
B. Chromium
C. Nichrome
D. Tungsten
Ans: C. Nichrome
Question 10.
Fleming’s right hand rule is used to find the direction of the
A. Alternate current
B. Direct current
C. Induced current
D.Actual current
Ans: C. Induced current
Question 11.
The safest hammers are those with heads that are
A. Cast steel and chiseled
B. Alloy and drop-forged steel
C. Welded and alloyed
D. Chiseled and drop forged
Ans: B. Alloy and drop-forged steel
Question 12.
A fixture is defined as a device which
A. Is used to check the accuracy of workpiece
B. Holds and locates a workpiece and guides and controls one or more cutting tools
C. Holds and locates a workpiece during an inspection or for a manufacturing operation
D. All of the above
Ans: B. Holds and locates a workpiece and guides and controls one or more cutting tools
Question 13.
When an electric bulb breaks, there is an explosive sound. That is due to
A. The chemical reaction between the gases inside the bulb
B. The compressed gases inside rushing out suddenly
C. The air outside rushing in to fill the vacuum inside the bulb
D. None of these
Ans: C. The air outside rushing in to fill the vacuum inside the bulb
Question 14.
A current carrying conductor is associated with
A. A magnetic field
B. An electric field
C. An electro-magnetic field
D. An electrostatic field
Ans: C. An electro-magnetic field
Question 15.
The function of ball bearings in a wheel is :
A. To increase friction
B.To convert kinetic friction into rolling friction
C. To convert static friction into kinetic friction
D. Just for convenience
Ans: A. To increase friction
Question 16.
What type of simple machine is an axe?
A. Lever
B. Wedge
C. Both A & B
D. The screw
Ans: C. Both A & B
Question 17.
Flemings ”Left hand Rule” is associated with the effect of
A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
D. Magnetic Field on current
Ans: D. Magnetic Field on current
Question 18.
In order to make an electromagnet you need a
A. Dry cell batteries
B. Thin coated copper wire
C. Iron nail
D. All of the above
Ans: D. All of the above
Question 19.
Gear finishing operation is called
A. Burnishing
B. Hobbing
C. Shaping
D. Milling
Ans: A. Burnishing
Question 20.
While ascending a hill, the driver of the vehicle keeps the gear ratio
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Either equal to or greater than 1
Ans: D. Either equal to or greater than 1
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
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- Physics MCQs Set-76
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