Two capacitors each of capacity 2 μF are connected in parallel. This system is connected in series with a third capacitor of 12 μF capacity. The equivalent capacity of the system will be
|
(a) 16 μF |
(b) 13 μF |
(c) 4 μF |
(d) 3 μF |
(d) 3 μF
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We combined a convex lens of focal length f1 and concave lens of focal lengths f2 and their combined focal length was F. The combination of these lenses will behave like a concave lens, if
|
(a) f1 > f2 |
(b) f1 < f2 |
(c) f1 = f2 |
(d) f1 ≤ f2 |
If two electric bulbs have 40 W and 60 W rating at 220 V, then the ratio of their resistances will be
|
(a) 9 : 4 |
(b) 4 : 3 |
(c) 3 : 8 |
(d) 3 : 2 |
In Young’s double slit experiment, the wavelength of the light used is doubled and distance between two slits is half of initial distance, the resultant fringe width becomes
|
(a) 2 times |
(b) 3 times |
(c) 4 times |
(d) 1/2 times |
To convert a 800 mV range milli voltmeter of resistance 40 W into a galvanometer of 100 mA range, the resistance to be connected as shunt is
|
(a) 10 W |
(b) 20 W |
(c) 30 W |
(d) 40 W |
$2\text{u}\cos\theta$
$\frac{\text{u}}{\cos\theta}$
$\frac{\text{2u}}{\cos\theta}$
$\text{u}\cos\theta$
A beam of ions with velocity 2 
enters normally into a uniform magnetic field of 4
If the specific charge of the ion is 5 
, then the radius of the circular path described will be
|
(a) 0.10 m |
(b) 0.16 m |
(c) 0.20 m |
(d) 0.25 m |
A steady current of 5 amps is maintained for 45 mins. During this time it deposits 4.572 gms of zinc at the cathode of a voltameter. E.C.E. of zinc is
|
(a) 3.387 |
(b) 3.387 |
|
(c) 3.384 |
(d) 3.394 |
