Assertion:- If barometer is acceleratated upwards, the level of mercury in the tube of barometer will decrease.
Reason:- The effective value of g will increase, so upthrust increase.

Statement I : If a barometer is accelerated upwards, the level of mercury in the tube of the barometer will decrease. Statement II : The effective value of g will increase, so upthrust will increase.

Assertion : If a pendulum is suspended in a lift and lift accelerates upwards, then its time period will decrease. Reason : Effective value of g will be g_(e)=g+a

Assertion : If a pendulum is suspended in a lift and lift accelerates upwards, then its time period will decrease. Reason : Effective value of g will be g_(e)=g+a

If the density of the liquid used in a barometer is increased, the atmospheric pressure will: (a) increase (b) decrease (c) remain the same

Assertion : In a freely falling liquid container, upthrust force is zero. Reason : In freely falling case value of effective value of g is zero.