Question 661:

• JAMB 1991

Which of the following phenomena is called photoelectric effect?

A. High energy electrons impinge on a metalic anode which then emits photons
B. A high energy photon emits photons as it slowed down
C. A metal absorbs quanta of light and then emits electrons
D. Two electrons are created from a quantum of light

Question 662:

• JAMB 1991

Find the tension T1 in the diagram above if the system is in equilibrium
[G = 10ms^-2]

A. 200/√3N
B. 100/√3N
C. 300/√3N
D. 100N

Question 663:

• JAMB 1991

A body is under action of a force F such that the force displacement graph of the body is semi circular as shown above. The work done on the body by the force in moving through 24 meters is

A. 36Ï€ J
B. 72π J
C. 144Ï€ J
D. 288Ï€ J

Question 664:

• JAMB 1991

Th internal resistance of each of the cells E1 and E2 Shown in the figure above is 2 Ohm. Calculate the total current in the circuit

A. 0.80A
B. 0.50A
C. 0.40A
D. 0.004A

Question 665:

• JAMB 1991

The net capacitance of the circuit shown above is

A. 8.0µF
B. 6.0µF
C. 4.0µF
D. 2.0µF