The commercial unit of electrical energy is kWh. 1 kWh equals how many joules?
A. 3.6 × 10³ J
B. 3.6 × 10⁶ J
C. 3.6 × 10⁴ J
D. 3.6 × 10⁵ J
Answer: Option B
Solution (By JKSSB Mock Tests)
1 kWh = 1000 W × 3600 s = 3,600,000 J = 3.6 × 10⁶ J. This is a standard conversion. Power (watt) × time (hour) gives energy. 1 watt = 1 J/s. Remember this for electricity bills.
Explanation:
Myopia (nearsightedness): image formed before retina, corrected with concave lens. Hypermetropia: cannot see near objects. Presbyopia age-related. Cataract lens opacity.
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