- AMetals increases and of semiconductor decreases.
- BSemeconductors increases and metals decreases.
- CIn both metals and semiconductors increases.
- DIn both metal and semiconductor decreases.
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For uranium nucleus how does its mass vary with volume
|
(a) m ∝ V |
(b) m ∝ 1/V |
(c) m ∝ |
(d) m ∝ |
What is the current (i) in the circuit as shown in figure
|
(a) 2 A |
(b) 1.2 A |
(c) 1 A |
(d) 0.5 A |
At a certain place the angle of dip is 30° and the horizontal component of earth's magnetic field is 0.50 Oersted. The earth's total magnetic field is
|
(a) |
(b) 1 |
(c) |
(d) |
A radioactive material has a half-life of 8 years. The activity of the material will decrease to about 1/8 of its original value in
|
(a) 256 year |
(b) 128 year |
(c) 64 year |
(d) 24 year |
Points A and B are situated along the extended axis of 2 cm long bar magnet at a distance x and 2x cm respectively. From the pole nearer to the points, the ratio of the magnetic field at A and B will be
|
(a) 4 : 1 exactly |
(b) 4 : 1 approx. |
(c) 8 : 1 exactly |
(d) 8 : 1 approx. |