Question 4581:

• NECO 2005

A stone of mass 0.7 kg is projected vertically upward with a speed of 5 ms-1. Calculate the maximum height reached. [g =10ms^-2]

A. 1.25m
B. 1.50m
C. 2.50m
D. 3.75m
E. 5.00Nm

Question 4582:

• NECO 2005

Calculate the magnitude of the force due to a magnetic field of 0.40T on an electron moving perpendicular to the field with a speed of 4.00 × 106ms^-1 (e 1.60 × 10^-19C]

A. 6.40 × ^-10
B. 6.40× 10^-13N
C. 2.56 × 10^-13N
D. 1.60 × 10^-12N
E. 2.30 × 10^-11N

Question 4583:

• NECO 2005

A voltage of 240V is connected to the primary coil of a the rating of the primary turns to the secondary turns if the voltage available at the secondary coil is 15V

A. 0.06
B. 0.9
C. 1.6
D. 16
E. 36

Question 4584:

• NECO 2005

Two metals A and B lose the same quantity of heat when their temperatures drop from 20°C to 15°C. If the specific heat Capacity of A Ii thrice that of B, calculate the ratio of the mass of A to that of B.

A. 3:01
B. 4:03
C. 3:04
D. 1:02
E. 1:03

Question 4585:

• NECO 2005

When a yellow card is viewed in blue light, It will appear

A. Black
B. Orange
C. Purple
D. Red
E. White