- AGlass.
- BPlastic.
- CNylon.
- DAll.
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The count rate of 10g of radioactive material was measured at different times and this has been shown in the figure. The half life of material and the total counts (approximately) in the first half life period, respectively are
|
(a) 4h, 9000 |
(b) 3h, 14000 |
(c) 3h, 235 |
(d) 3h, 50 |
Ge and Si diodes conduct at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are reversed, the valve of V0 changes by
|
(a) 0.2 V |
(b) 0.4 V |
(c) 0.6 V |
(d) 0.8 V |
Complete the reaction ![]()
|
(a) |
(b) |
(c) |
(d) |
Charges 4Q, q and Q and placed along x-axis at positions x = 0, x = l/2 and x = l, respectively. Find the value of q so that force on charge Q is zero
|
(a) Q |
(b) Q / 2 |
(c) – Q / 2 |
(d) – Q |