2019 - JAMB Physics Past Questions and Answers - page 6

51

One newton × one meter is equal to ___

A

One water

B

One Joule

C

One ampere

D

One kilogram

52

A microscope is focused on a mark on a table, when the mark is covered by a plate of glass 2m thick, the microscope has to be raised 0.67cm for the mark to be once more in focus. Calculate the refractive index.

A

1.52

B

1.68

C

2.58

D

1.82

53

Radio waves belongs to the class of ware whose velocity is about

A

340m/s

B

3 × 106 m/s

C

3 × 108 m/s

D

3 × 108 m/s

54

A single force which produces the same effect as a set of forces acting together at a point is known as the

A

component

B

equilibrant

C

resultant

D

resistant

55

Which of the following statement about the electromagnet shown above is correct?

A

when the current flows from A to B, the end A will be in north pole

B

when the current flows from A to B, the end A will be south pole

C

when the current flows from A to B, the end B will be north pole

D

none of the above

56

Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm

A

230π

B

23π

C

70π

D

140π

57

The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

A
angle of variation is zero
B
magnetic declination is 90
C
angle of dip is zero
D
horizontal component at the Earth's field is zero
58

The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

A

angle of variation is zero

B

magnetic declination is 90

C

angle of dip is zero

D

horizontal component at the Earth's field is zero

59

A car moving at 20m/s with its horn blowing (f = 1200Hz) is chasing another car going at 15m/s. What is the apparent frequency of the horn as heard by the driver being chased?

A

1.22KHz

B

2.40KHz

C

8.12KHz

D

1.22Hz

60

Any line or section taken through an advancing wave in which all the particles are in the same phase is called the

A

wavelength

B

wave coast

C

wave trough

D

wave front

Please share this, thanks: