- Aelectromagnetism
- Bmagnetoelectricism
- Celectricmagnetism
- Dmagneticelectromerism
Explanation:
Study of phenomenon involving both electricity and magnetism is called electromagnetism.
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| (a) Nuclei of different elements can have the same number of neutrons |
| (b) Every element has only two stable isotopes |
| (c) Only one isotope of each element is stable |
| (d) All isotopes of every element are radioactive |
Assertion : When radius of circular loop carrying current is doubled, its magnetic moment becomes four times.
Reason : Magnetic moment depends on area of the loop.
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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. |
A logic gate is an electronic circuit which
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(a) Makes logic decisions |
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(b) Allows electrons flow only in one direction |
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(c) Works binary algebra |
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(d) Alternates between 0 and 1 values |
Two resistors whose value are in ratio 2 : 1 are connected in parallel with one cell. Then ratio of power dissipated is
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(a) 2 : 1 |
(b) 4 : 1 |
(c) 1 : 2 |
(d) 1 : 1 |
Atomic weight of boron is 10.81 and it has two isotopes
and
. Then ratio of
in nature would be
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(a) 19 : 81 |
(b) 10 : 11 |
(c) 15 : 16 |
(d) 81 : 19 |
The neutron was discovered by
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(a) Marie Curie |
(b) Pierre Curie |
(c) James Chadwick |
(d) Rutherford |