An electron microscope is superior to an optical microscope in
|
(a) Having better resolving power |
(b) Being easy to handle |
|
(c) Low cost |
(d) Quickness of observation |
(a) Having better resolving power
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Sodium has body centred packing. If the distance between two nearest atoms is 3.7 Å, then its lattice parameter is
|
(a) 4.8 Å |
(b) 4.3 Å |
(c) 3.9 Å |
(d) 3.3 Å |
Assertion : If two long wires, hanging freely are connected to a battery in series, they come closer to each other.
Reason : Force of attraction acts between the two wires carrying current.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
