Electricity And Magnetism - Study Mode

[#231] Which direction does the freely suspended magnet indicate?
Correct Answer

(B) North-South

[#232] Why is tungsten used in electric bulbs?
Correct Answer

(B) It has a high melting point

[#233] Electric motors operating at low voltages tend to burn out because
Correct Answer

(A) They draw more current which is inversely proportional to the voltage

[#234] By which electric current in a circuit is possible?
Correct Answer

(D) motion of electrons

[#235] In medicine, . . . . . . . . is a device such as small metal plate or needle that carries electricity from an instrument to a patient for treatment or surgery
Correct Answer

(A) an electrode