The current in the adjoining circuit will be

|
(a) |
(b) |
(c) |
(d) |
The current in the adjoining circuit will be

|
(a) |
(b) |
(c) |
(d) |
(c)
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In Young's experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width
|
(a) Will not change |
(b) Will become half |
|
(c) Will be doubled |
(d) Will become four times |
A monochromatic beam of light passes from a denser medium into a rarer medium. As a result
|
(a) Its velocity increases |
(b) Its velocity decreases |
|
(c) Its frequency decreases |
(d) Its wavelength decreases |
Which of the following graphs shows the variation of magnetic induction B with distance r from a long wire carrying current
|
(a) |
(b) |
(c) |
(d) |
$\overrightarrow{\text{F}}.\overrightarrow{\text{a}}$
$\overrightarrow{\text{v}}.\overrightarrow{\text{r}}$
$\overrightarrow{\text{a}}.\overrightarrow{\text{r}}$
$\overrightarrow{\text{F}}.\overrightarrow{\text{r}}$