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.
A.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
From Wien's displacement law, temperature (T) ∝ 1/ λm (where λm is the maximum wavelength). Thus temperature of a body is inversely proportional to the wavelength. Since blue star has smaller wavelength and red star has maximum wavelength, therefore blue star is at higher temperature then red star.
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