Basic Electrical Engineering objective questions (mcq) and answers

46.  For testing appliances, the wattage of test lamp should be

   A. Very low

   B. Low

   C. High

   D. Any value

47.  In the case of direct current

   A. Magnitude and direction of current remains constant

   B. Magnitude and direction of current changes with time

   C. Magnitude of current changes with time

   D. Magnitude of current remains constant

48.  Voltage dependent resistors are used

   A. For inductive circuits

   B. To suppress surges

   C. An heating elements

   D. As current stabilizers

49.  Which of the following could be the value of resistivity of copper ?

   A. 1.72 × 10^-4 Ω-m

   B. 1.72 × 10^-9 Ω-m

   C. 1.72 × 10^-6 Ω-m

   D. 1.72 × 10^-8 Ω-m

50.  Specific resistance of a substance is measured in

   A. Ω/m

   B. Ω/m²

   C. Ω-m

   D. m/Ω

< 1 2 3 4 5 6 7 8 9 10