Physics Past Questions and Answers

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:

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

A 200/âˆš3N
B 100/√3N
C 300/âˆš3N
D 100N

Question 663:

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:

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:

The net capacitance of the circuit shown above is

A 8.0ÂµF
B 6.0µF
C 4.0ÂµF
D 2.0ÂµF