Question
Can a battery be charged with alternating current?
✓
Answer
No, because direction of ac current changes periodically.
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Write the name of that part of electromagnetic spectrum with which electromagnetic waves of following wavelength associated. Write them in descending order of wavelength.
(a) $\lambda_1$ : used in treatment of muscular strains
(b) $\lambda_2$ : used in radio transmission
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→(a) $\lambda_1$ : used in treatment of muscular strains
(b) $\lambda_2$ : used in radio transmission
(c) $\lambda_3$ : used to detect fracture in bones
(d) $\lambda_4:$ are absorbed by ozone layer in the atmosphere
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| $L_1$ | 3 D | 8 cm |
| $L_2$ | 6 D | 1 cm |
| $L_3$ | 10 D | 1 cm |
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Point out the two curves for which the incident radiations have same frequency but different intensities.
→Point out the two curves for which the incident radiations have same frequency but different intensities.
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