X-rays which can penetrate through longer distances in substance are called
|
(a) Soft X-rays |
(b) Continuous X-rays |
(c) Hard X-rays |
(d) None of the above |
(c) Hard X-rays
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The speed of light in air is 3 
. What will be its speed in diamond whose refractive index is 2.4
|
(a) 3 |
(b) 332 m/s |
(c) 1.25 |
(d) 7.2 |
Three capacitors are connected to D.C. source of 100 volts shown in the adjoining figure. If the charge accumulated on plates of 
and 
are 
and 
respectively, then
|
(a) |
(b) |
|
(c) |
(d) |
A combination of two thin lenses of the same material with focal lengths 
and 
, arranged on a common axis minimizes chromatic aberration, if the distance between them is
|
(a) |
(b) |
(c) ( |
(d) |
Change Q on a capacitor varies with voltage V as shown in the figure, where Q is taken along the X-axis and V along the Y-axis. The area of triangle OAB represents
|
(a) Capacitance |
(b) Capacitive reactance |
|
(c) Magnetic field between the plates |
(d) Energy stored in the capacitor |
Which of the planet is brightest
|
(a) Mercury |
(b) Venus |
(c) Mars |
(d) Jupiter |
