Assertion: The flash of lightening is seen before the sound of thunder is heard.
Reason: Speed of sound is greater than speed of light.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: Blue star is at high temperature than red star.
Reason: Wein's displacement law states that T ∝ ( 1/λm ).
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: The time-period of pendulum, on a satellite orbiting the earth is infinity.
Reason: Time-period of a pendulum is inversely proportional to
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: Stress is the internal force per unit area of a body.
Result: Rubber is more elastic than steel.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: The earth without its atmosphere would be inhospitably cold.
Reason: All heat would escape in the absence of atmosphere.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: In simple harmonic motion, the motion is to and fro and periodic.
Reason: Velocity of the particle ( v) = ω ( where x is the displacement ).
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: Woolen clothes keep the body warm in winter.
Reason: Air is a bad conductor of heat.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
An electron having charge 'e' and mass m is moving in a uniform electric field E. Its acceleration will be
In the given figure, the capacitance C1, C3, C4 and C5 have a capacitance 4 μF each. If the capacitor C2 has a capacitance 10 μF, then effective capacitance between A and B will be
2 μF
6 μF
4 μF
8 μF
C.
4 μF
Capacitance of capacitors C1 , C3 , C4 , C5 = 4 μF each and capacitance of capacitor C2 = 10 μF.
If a battery is applied across A and B, the points b and c will be at the same potential ( since C1 = C4 = C3 = C5 = 4 μF )
Therefore no charge flows through C2.
We have the capacitors C1 and C5 in series.
Therefore their equivalent capacitance
C'' =
=
C" = 2 μF
Now C' and C" are in parallel. Therefore capacitance between A and B
= C' + C"
= 2 + 2
= 4 μF