- AAl
- BB
- CGa
- ✓P
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$\frac{\text{W}}{2}$
$2^{\frac{1}{3}}$ W at the planet.
Consider the following two statements
A. Energy spectrum of a-particles emitted in radioactive decay is discrete
B. Energy spectrum of b-particles emitted in radioactive decay is continuous
|
(a) Only A is correct |
(b) Only B is correct |
|
(c) A is correct but B is wrong |
(d) Both A and B are correct |
In a movie hall, the distance between the projector and the screen is increased by 1% illumination on the screen is
|
(a) Increased by 1% |
(b) Decreased by 1% |
(c) Increased by 2% |
(d) Decreased by 2% |
A long wire A carries a current of 10 amp. Another long wire B, Which is parallel to A and separated by 0.1m from A, carries a current of 5 amp, in the opposite direction to that in A. what is the magnitude and nature of the force experienced per unit length of B (![]()
|
(a) Repulsive force of |
(b) Attractive force of |
|
(c) Repulsive force of 2π × |
(d) Attractive force of 2π |
Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is
|
(a) 24 ohm |
(b) 16 ohm |
(c) |
(d) |
A copper disc of radius 0.1 m is rotated about its centre with 10 revolutions per second in a uniform magnetic field of 0.1 Tesla with its plane perpendicular to the field. The e.m.f. induced across the radius of disc is
|
(a) |
(b) |
(c) π |
(d) 2π |