In an experiment to study the photoelectric effect, a beam of monochromatic light is aimed at a cathode. However, the cathode does not release electrons. Which change to the experiment is most likely to cause the release of electrons? A. increasing the frequency of the monochromatic light
B. decreasing the frequency of the monochromatic light
C. increasing the intensity of the monochromatic light
D. aiming the beam of light at the anode instead of the cathode

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa. jouté b. watt c. newtond. pascal71. which of the following is not influenced by a magneta. cobalt b. copper c. irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b. red c. green d. yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm