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ECAT - Practice Test - Physics - Current Electricity Quiz

Attempt 10 MCQs on ECAT - Practice Test - Physics - Current Electricity | Quiz 5

41. If length of a wire is doubled, what happens to resistance?



42. If area is doubled, what happens to resistance?



43. What is the relation between conductivity and resistivity?



44. What is the potential gradient in a potentiometer?



45. Why is a potentiometer more accurate than a voltmeter?



46. What is the condition for a balanced Wheatstone bridge?



47. What is the current when a 6 V cell (r=1 Ω) is connected to a 5 Ω resistor?



48. What is the terminal voltage of the cell in the previous question?



49. What is the total current from a 12 V battery across 2 Ω, 3 Ω, and 6 Ω in parallel?



50. What is the current through a 100 W bulb on a 220 V supply?



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