Physics Past Questions and Answers

One of the following readings represents the measurement of the length of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is

A 5.16cm
B 5.165cm
C 5.0cm
D 5.160cm

Question 2212:

When a sound wave passes from air into water its

A Speed and frequency increases but its wavelength remains the same
B Speed and wavelength increases but its frequency remains the same
C Speed decreases
D Speed increases but its frequency and wavelength decreases

Question 2213:

A convex mirror is used as a driving mirror because I. its image is erect II. It has a large field of view III. It has a long focal length Identify the CORRECT statement(s)

A I and III only
B I and II only
C II and IIII only
D I, II and III only

Question 2214:

<img src='https://www.schoolngr.com/eattachments/8bdc6358557cb2b4a88ce8a67b37df98aaf26937' width='300'/> Two mirrors of the same length are arranges as show in the diagram. A ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

A 220\(^o\)
B 200\(^o\)
C 210\(^o\)
D 180\(^o\)

Question 2215:

A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

A 0\(^o\) and 0\(^o\)
B 60\(^o\) and 60\(^o\)
C 90\(^o\) and 90\(^o\)
D 90\(^o\) and 0\(^o\)