Question 51:

• JAMB 1978

Of the following which is different from the other?

A. X-rays
B. Gamma-rays
C. Cathode rays
D. Ultra violet rays
E. Infrared rays

Question 52:

• JAMB 1978

The net charge on the atom is zero because

A. The electrons and the protons that are charged are in the nucleus
B. The total charge on the electrons is equal to the total charge on the protons
C. The neutrons from a shield around the charged protons
D. The number of electrons in an atom is half the number of protons
E. A and B above

Question 53:

• JAMB 1978

The amount of heat required to raise the temperature of a body is

A. Thermal energy
B. Thermal conduction
C. Heat loss
D. Specific heat capacity
E. Thermal capacity

Question 54:

• JAMB 1978

Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is

A. 10W
B. 20W
C. 40W
D. 80W
E. None of the above

Question 55:

• JAMB 1978

In The Diagram, what is the value of W

A. 5N
B. 10N
C. 15N
D. 20N
E. 30N