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CBSE Class 12-science Answered

why can't we use metal utensils in microwave oven?
Asked by | 24 Aug, 2008, 01:12: PM
answered-by-expert Expert Answer

Microwave cannot penetrate metal, so metal utensils or dishes with metallic trim should not be used.

Answered by | 26 Aug, 2008, 08:44: AM

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CBSE 12-science - Physics
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Asked by r01raunak | 23 May, 2023, 10:24: AM
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CBSE 12-science - Physics
Kirchhoff law
Asked by komalbrar0987 | 17 May, 2023, 06:15: PM
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CBSE 12-science - Physics
obtain the lens formula in case of concave lens
Asked by marvellouskyndiah | 17 May, 2023, 08:07: AM
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CBSE 12-science - Physics
semi conductor
Asked by Abhishek | 23 Mar, 2023, 08:37: PM
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CBSE 12-science - Physics
Soft iron is used to make the core of transformer because of it's.....  a) low coercivity and low retentivity b) high corecivity and low retentivity Chose correct option and give reason. 
Asked by Jayashri | 06 Mar, 2023, 06:47: PM
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CBSE 12-science - Physics
Please answer this question. Draw a graph showing the variation of binding energy per nucleon as a function of mass number A. The binding energy per nucleon for heavy nuclei (A > 170) decreases with the increase in mass number. Explain.
Asked by varma.renu9481 | 06 Mar, 2023, 05:44: PM
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CBSE 12-science - Physics
Please answer below question from 2023 board paper:  
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Asked by prachis14 | 06 Mar, 2023, 04:49: PM
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CBSE 12-science - Physics
An inductor, a capacitor and a resistor are connected in series across an ac source of voltage. If the frequency of the source is decreased gradually. the reactance of: (a) both the inductor and the capacitor decreases. (b) inductor decreases and the capacitor increases. (c) both the inductor and the capacitor increases. (d) inductor increases and the capacitor decreases.
Asked by paresh0311 | 06 Mar, 2023, 04:42: PM
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CBSE 12-science - Physics
Answer this:  Assertion (A): When radius of a circular loop carrying a steady current is doubled, its magnetic moment becomes four times.  Reason (R): The magnetic moment of a circular loop carrying a steady current is proportional to the area of the loop.  Select the correct answer from the codes (a), (b), (c) and (d) as given belote.  (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).  (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).  (c) Assertion (A) is true, but Reason (R) is false.  (d) Assertion (A) is false and Reason (R) is also false.
Asked by anubhutiupadhaya | 06 Mar, 2023, 04:23: PM
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CBSE 12-science - Physics
Please answer this.  What is meant by the term 'displacement current'? Briefly explain how this current is different from a conduction current.
Asked by sagarmishra | 06 Mar, 2023, 04:07: PM
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