- AElliptical
- BCylindrical
- CCircular
- DOval
Explanation:
First electron shell which is closest to the orbit to the nucleus, called the 1s orbit can hold up two two electrons. This orbit is equivalent to the innermost electron shell of the Bhor model of atom. It is called the orbital because it is spherical around the nucleus.
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Magnets A and B are geometrically similar but the magnetic moment of A is twice that of B. If T1 and T2 be the time periods of the oscillation when their like poles and unlike poles are kept together respectively, then
will be
|
(a) |
(b) |
(c) |
(d) |

In transformer, core is made of soft iron to reduce
|
(a) Hysteresis losses |
(b) Eddy current losses |
|
(c) Force opposing electric current |
(d) None of the above |
A 100 W bulb B1, and two 60-W bulbs B2 and B3, are connected to a 250 V source, as shown in the figure. Now W1, W2 and W3 are the output powers of the bulbs B1, B2 and B3, respectively. Then
|
(a) |
(b) |
(c) |
(d) |
If the voltage of X-ray tube is doubled, the intensity of X-rays will become
|
(a) Half |
(b) Unchanged |
(c) Double |
(d) Four times |