Electricity And Magnetism - Study Mode
[#191] Consider the following statements. 1. Ohm's law is not applicable at very low and very high temperature. 2. Ohm's law is applicable to semiconductor. 3. Ohm's law is not applicable to electron tubes, discharge tubes and electrolytes. 4. Conductance is the reciprocal of resistance and ismeasured in siemens. Which of the statements given above are correct?
Correct Answer
(C) 1, 3 and 4
[#192] Which of the following statement(s) is/are correct?
Correct Answer
(A) The net magnetic flux through any closed surface is zero
[#193] Which of the following has low resistivity?
Correct Answer
(A) Nichrome
[#194] What is the resistivity of insulators?
Correct Answer
(D) 10 12 Ωm to 10 17 Ωm
[#195] An electric current of 0.75A flows in a filament of an electric bulb for 10 minutes. Find the amount of electric charge flowing through the current.
Correct Answer
(A) 450 C