Sawaal

 Physics Questions

Popular Latest Rated
Q:

When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is

A) the violet ray B) the red ray
C) the green ray D) the blue ray
 
Answer & Explanation Answer: B) the red ray

Explanation:

Red is deviated the least and violet the most

Report Error

View Answer Report Error Discuss

Filed Under: Physics

14 6573
Q:

Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days 

A) the pores in the pot are closed B) rain water stops oozing out from the pores
C) the water that oozes out does not evaporate quickely because of the large percent age of moisture in the air D) surface of the pot becomes damp
 
Answer & Explanation Answer: C) the water that oozes out does not evaporate quickely because of the large percent age of moisture in the air

Explanation:

To evaporate the water that oozes out, heat is required. Part of this heat is taken from the water inside which therefore become cool. Therefore (C) is correct. Here evaporation is less, so cooling too is less.

Report Error

View Answer Report Error Discuss

Filed Under: Physics

11 6530
Q:

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be

A) 2 B) 6
C) 5 D) 3
 
Answer & Explanation Answer: B) 6

Explanation:

Number of spectral lines from a state n to ground state is

 

                   n(n-1)/2 = 6

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: AIEEE

11 6465
Q:

What type of simple machine is an axe?

A) Lever B) Wedge
C) Both A & B D) The screw
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The simple machine Axe is made up of both the lever arm and a wedge.

                              what_type_of_simple_machine_is_an_axe1536562753.png image

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

4 6419
Q:

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
 
Answer & Explanation Answer: C) the air outside rushing in to fill the vacuum inside the bulb

Explanation:

The inside of the bulb being a vacuum, the outside air rushes in when the bulb is broken. The vibrations of the rushing air molecules produce the sound.

Report Error

View Answer Report Error Discuss

Filed Under: Physics

13 6380
Q:

Which of the following physical quantities have the same dimensions

A) momentum and impulse B) power and young modulus
C) Energy and angular Momentum D) force constant and moment of inertia
 
Answer & Explanation Answer: A) momentum and impulse

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics

7 6330
Q:

Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as

A) Cornering B) BLowout
C) Power D) Braking
 
Answer & Explanation Answer: D) Braking

Explanation:

A skid happens whenever the tires lose their grip on the road. Braking skids occur when the brakes are applied so hard that the front or rear wheels lose traction.

Skids_occur_when_the_brakes_are_applied1561010817.jpg image

Report Error

View Answer Report Error Discuss

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

1 6304
Q:

Which one of the following groups have quantities that do not have the same dimensions

A) pressure, stress B) velocity, speed
C) force, impulse D) work, energy
 
Answer & Explanation Answer: C) force, impulse

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Physics

9 6111