- A$9\times10^{9}mF^{-1}$
- B$1.6\times10^{-19}C$
- ✓$8.85\times10^{-12}Fm^{-1}$
- D$8.85\times10^{-9}Fm^{-1}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : For cooking in a microwave oven, food is always kept in metal containers.
Reason : The energy of microwave is easily transferred to the food in metal container.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The amplification factor of a triode is 50. If the grid potential is decreased by 0.20 V, what increase in plate potential will keep the plate current unchanged
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(a) 5 V |
(b) 10 V |
(c) 0.2 V |
(d) 50 V |
The momentum of a photon in an X-ray beam of
metre wavelength is
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(a) 1.5 |
(b) 6.6 |
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(c) 6.6 |
(d) 2.5 |
A thin circular wire carrying a current I has a magnetic moment M. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment
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(a) M |
(b) |
(c) |
(d) |
Assertion : NAND or NOR gates are called digital building blocks.
Reason : The repeated use of NAND (or NOR) gates can produce all the basic or complicated gates.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |