Physics Past Questions and Answers

When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as

A Beats
B Echoing
C Resonance
D Reverberation

Question 647:

Which of the following statements is CORRECT about the earth's magnetic field?

A The angle of dip is the angle which a freely suspended magnet makes with the vertical
B The angle of declination is the angle between the magnetic meridian and the geographic meridian
C The angle of declination is the angle which a magnetic compass makes with the magnetic meridian
D The angle of inclination is the difference between the angle of dip and the angle of declination

Question 648:

An insulated rod when rubbed with a material acquires

A A negative charge if it is made of glass and rubbed with silk
B No charge if it is made of glass and rubbed with fur
C No charge if it is made of copper and rubbed with silk
D A positive charge if it is made of copper and rubbed with fur

Question 649:

The function of the system of granulated carbon mixed with manganese (IV) oxide in a Letanche cell is to

A Increase the e.m.f. of the cell to 2.0V
B Prevent local action in the cell
C Prevent polarisation in the cell
D Make the cell black and hence a good radiator

Question 650:

A moving coil galvanometer of 300\(\Omega\) resistance gives full scale deflection for 1.0mA. The resistance R, of the shunt that is required to convert the galvanometer into a 3.0A ammeter is

A 899.70\(\Omega\)
B 10.00\(\Omega\)
C 0.10\(\Omega\)
D 0.01\(\Omega\)