The current between B and D in the given figure is
|
(a) 1 amp |
(b) 2 amp |
(c) Zero |
(d) 0.5 amp |
The current between B and D in the given figure is
|
(a) 1 amp |
(b) 2 amp |
(c) Zero |
(d) 0.5 amp |
(c) Zero
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Line spectrum contains information about
|
(a) The atoms of the prism |
|
(b) The atoms of the source |
|
(c) The molecules of the source |
|
(d) The atoms as well as molecules of the source |
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate.
|
(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. |
Assertion : The tangent galvanometer can be made more sensitive by increasing the number of turns of its coil.
Reason : Current through galvanometer is proportional to the number of turns of coil.
|
(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. |
In
nucleus, there are
|
(a) 138 protons and 88 neutrons |
(b) 138 neutrons and 88 protons |
|
(c) 226 protons and 88 electrons |
(d) 226 neutrons and 138 electrons |
Assertion : The cloud in sky generally appear to be whitish.
Reason : Diffraction due to cloud is efficient in equal measure at all wavelengths.
|
(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. |
When a dielectric material is introduced between the plates of a charged condenser then electric field between the plates
|
(a) Decreases |
(b) Increases |
(c) Remain constant |
(d) First (b) then (a) |
Two lenses of power 6D and – 2D are combined to form a single lens. The focal length of this lens will be
|
(a) |
(b) |
(c) 4 m |
(d) |
A coil of inductance 40 henry is connected in 0series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is
|
(a) 40 seconds |
(b) 20 seconds |
(c) 8 seconds |
(d) 5 seconds |