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A physical quantity A is related to four observations a,b,c and d as follows, A- measurement in a,b,c and d are 1%, 3%, 2% and 2% ntage eros of respectively. What is the percentage error in the quantity A 12% 5% [Kerala PET 2005; MP PET 2006: NEET 2013] 7% 14% (b) (d) (a) (c)
NEET
Statement-1Least count of a screw based instruments are same. Statement-2Least count for all screw based instruments are found using the ratio pitch per division of circular scale.
Which of the following quantities has not been expressed in proper unit (a) Torque (b) Stress (c) Modulus of elasticityNewton metre (d) Power e) Surface tension Kerala PMT 2009 Newton metre Newton metre Newton metre second Newton metre
PMT
In the relation PP is pressure, Z is the distance, k is Boltzmann's constant and θ is the temperature. The dimensional formula of β will be [IIT (Screening) 20041 (b) MLT (c) MLT (d) IM LT
A student measures the distance traversed in free fall of a body, initially at rest in a given time. He uses this data to estimate g, the acceleration due to gravity. If the maximum percentage enrors in measurement of the distance and the time are e and e2 respectively, the percentage error in the estimation of g is (a) e2-e (d) e, +e [CBSE PMT (Mains) 2010] (tb) e,+2e (b)e 2e2 (d) e, -2e2
PMT
Assertion When we change the unit of measurement of a quantity, its numerical value changes. Reason :. Smaller the unit of measurement smaller is its numerical value.
The percentage errors in the measurement of length and time period of a simple pendulum are 1% and 2% respectively. Then the maximum error in the measurement of acceleration due to gravity is (a) 8% (c) 4% (e) 5% [Kerala PET 2009 (b) 3% (d) 6%
The dimension of 는。E2, where eo is permittivity of free space and E is electric field, is (a) MLT 2 ICBSE PMT 2010] (b) M2T2 (d) M2T
PMT
The mean time period of seconds pendulum is 2.00s and mean absolute error in the time perlod is 0.05s. To express maximum estimate of error, the time period should be written as (a) (2.00 ± 0.01) s (c) (2.00±0.05) s (b) (d) (2.00 +0.025) s (2.00±0.10) s
The percentage errors in the measurement of mass and speed are 2% and 3% respectively. How much will be the maximum eror in the estimation of the kinetic energy obtained by measuring mass and speed (a) 11% (c) 5% (b) (d) 8% 1%