- A$\Omega\text{m}^{-1}$
- B$\Omega^{-1}\text{m}^{-1}$
- C$\Omega1$
- D$2.5-\text{m}^2$
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A radioactive nucleus undergoes a-emission to form a stable element. What will be the recoil velocity of the daughter nucleus if V is the velocity of a-emission and A is the atomic mass of radioactive nucleus
|
(a) |
(b) |
(c) |
(d) |
The half-life of a radioactive substance against a-decay is 1.2
. What is the decay rate for 4
atoms of the substance
|
(a) 4.6 |
(b) 2.3 |
|
(c) 4.6 |
(d) 2.3 |
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in parallel across a 440 V line
|
(a) Only 100 watt bulb will fuse |
(b) Only 25 watt bulb will fuse |
|
(c) Both bulbs will fuse |
(d) None of the bulbs will fuse |
A thermo couple uses Bismuth and Tellurium as the dissimilar metals. The sensitivity of bismuth is -72μV/℃ and that of the tellurium is 500μV/℃. If the difference between hot and cold junction is 100℃ then the maximum output will be
|
(a) 50 mV |
(b) 7.2 mV |
(c) 42.8 mV |
(d) 57.2 mV |
The refractive index of the material of the prism and liquid are 1.56 and 1.32 respectively. What will be the value of q for the following refraction
|
(a) sinθ ≥ |
(b) sinθ ≥ |
(c) sinθ ≥ |
(d) sinθ ≥ |