Correct answer
D. 2 seconds
Explanation
2 seconds is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
If a current carrying solenoid is suspended freely it will__________________?
Michelson devised the formula to calculate the speed of light_______________?
For a gas obeying Boyles law if the pressure is doubled the volume becomes________________?
An inductor may store energy in ________________?
How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ?