A soap bubble is given a negative charge, then its radius
|
(a) Decreases |
|
(b) Increases |
|
(c) Remains unchanged |
|
(d) Nothing can be predicted as information is insufficient |
(b) Increases
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The dimension of (1/2) 
: permittivity of free space; E : electric field) is
|
(a) |
(b) |
(c) |
(d) |
In the circuit as shown in the figure the effective capacitance between A and B is
|
(a) 3 μF |
(b) 2 μF |
(c) 4 μF |
(d) 8 μF |
Assertion : The television broadcasting becomes weaker with increasing distance.
Reason : The power transmitted from TV transmitter varies inversely as the distance of the receiver
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
The wavelength of emission line spectrum and absorption line spectrum of a substance are related as
|
(a) Absorption has larger value |
(b) Absorption has smaller value |
|
(c) They are equal |
(d) No relation |
A person cannot see objects clearly beyond 2.0 m. The power of lens required to correct his vision will be
|
(a) + 2.0 D |
(b) – 1.0 D |
(c) + 1.0 D |
(d) – 0.5 D |
