In an energy level transition from the n = 2 state to the n = 1 state for a hydrogen atom a photon will be ___________
Fill in the blank(s) with correct word
emitted
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Suppose you left five 100-W light bulbs burning in the basement for two weeks. If electricity costs 10.0ยข/kW?h,
(a) how much did the electricity cost (to the nearest dollar) to leave those bulbs on, and (b) how many joules of electrical energy did they consume?
If an electric toaster rated at 110 V is accidently plugged into a 220-V outlet, the current drawn by the toaster will be
A) half its normal value. B) the same as its normal value. C) twice its normal value. D) none of the above
A long conducting bar moves with a constant velocity in a uniform magnetic field. The bar and its velocity are perpendicular to the magnetic field as shown. Which of the following statements are true?
A. At steady state there is an electric field in the bar.
B. At steady state there is a current in the bar.
C. At steady state there is a magnetic force on bar.
If the electric field is zero in some region of space is the electric potential zero there as well? Explain
What will be an ideal response?