Search SchoolNGR

Physics Past Questions and Answers

Classroom

Physics Questions

Question 126:

Heat is supplied to a block of ice 0<sup style='font-size: smaller;'>o</sup> until half of it has melted. Which of the following statements is true?

SchoolNGR Classroom

A The temperature rises and the ice exoands
B The temperature remains constant and the volume of ice decreases
C The ice gives out heat as it melts
D The mass remains constant and the temperature increases
E The mass decreases because some heat is lost to the atmosphere

View Answer & Explanation

Question 127:

If the volume of a fixed mass of a gas is kept constant, the pressure of the gas

SchoolNGR Classroom

A Is inversely proprotional to its centigrade temperature
B Is inversely proportional to its absolute temperature
C Is directly proportional to its centigrade temperature
D Is directly proportional to its absolute temperature
E Remains constant also

View Answer & Explanation

Question 128:

Which of the following statements about sound is NOT true?

SchoolNGR Classroom

A Sound is a longitudinal wave
B Sound can be reflected and refracted like light
C Sound travels through a vacuum
D Sound moves faster in a steel wire than in air
E Sound can ony be produced by vibrating objects

View Answer & Explanation

Question 129:

In a compound microscope

SchoolNGR Classroom

A There is only one lens
B The objective lens have a shorter focal length than the eyepiece which is convex
C The objective lens has a longer focal length than the eyepiece which is convex
D The objective lens has a shorter focal length than the eyepiece which is concave
E The objective and the eyepiece are both convex and have the same focal length

View Answer & Explanation

Question 130:

In sunlight, a blue flower looks blue because we see the flower by the light it

SchoolNGR Classroom

A Recieves from our eye
B Disperses
C Absorbs
D Refracts
E Reflects

View Answer & Explanation

Stay Updated

Follow us on:

Subjects