- ARemains precisely constant.
- BIncreases slightly.
- CDecreases slightly.
- DMay increase slightly or may decrease slightly.
Explanation:
If a body is charged by rubbing it, its weight may increase slightly or may decrease slightly.
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What determines the hardness of the X-rays obtained from the Coolige tube
|
(a) Current in the filament |
| (b) Pressure of air in the tube |
| (c) Nature of target |
| (d) Potential difference between cathode and target |
Intrinsic semiconductor is electrically neutral. Extrinsic semiconductor having large number of current carriers would be
|
(a) Positively charged |
|
(b) Negatively charged |
|
(c) Positively charged or negatively charged depending upon the type of impurity that has been added |
|
(d) Electrically neutral |
Find the power of the circuit
|
(a) 1.5 W |
(b) 2 W |
(c) 1 W |
(d) None of these |
The dimension of (1/2)
: permittivity of free space; E : electric field) is
|
(a) |
(b) |
(c) |
(d) |