Q.1
The least count of a stop watch is 1/5 second. The time of oscillations of a pendulum is measured to be 25 second. Minimum % error in the measurement of time will be ..
  • a) 0.1%
  • b) 0.8%
  • c) 1.8%
  • d) 8%
Q.2
The dimensions of e.m.f in MKSQ system are..
  • a) MT-2Q-2
  • b) ML2T-2Q-2
  • c) ML2T-2Q-1
  • d) ML2T-2Q2
Q.3
Volume of one drop of mercury is 1.76cc volume of 25 such drop will be
  • a) 44cc
  • b) 0.44cc
  • c) 4.4cc
  • d) 44.00cc
Q.4
The dimension of R in the expression Q=Qo(1-e-t/RC) is given by
  • a) [ML2T-3A-2]
  • b) [ML2T-2A-3]
  • c) [T]
  • d) [M-1L-2T-3A-1]
Q.5
If K represents kinetic energy, V velocity and T time, and these are chosen as the fundamental unit then, the units of surface tension will be..
  • a) KV-2T-2
  • b) KV-1T-2
  • c) K2V-1T-3
  • d) KV-2T-1
Q.6
The velocity of water wave is found to be proportional to λaρbgc, where λ is the wave length, ρ is density of water and g is gravitational acceleration. Then the values of a,b,c are
  • a) 1,0, 1
  • b) 1/2, 1, 0
  • c) 1/2, 0, 1/2
  • d) 1/2, 0, 1
Q.7
E, m, L and G denote energy, mass, angular momentum and gravitational constant respectively. Then the dimensions of El2/m5G2 are
  • a) angle
  • b) length
  • c) mass
  • d) time
Q.8
When 2.0734 is added to 35.2 the sum is
  • a) 37.2734
  • b) 37.273
  • c) 37.3
  • d) 37.27
Q.9
A body travels uniformly a distance of (12.6±0.2)m in a time (3.0±0.3) s. the velocity of body within error limits is
  • a) (4.2±0.5) m/s
  • b) (4.2±0.3) m/s
  • c) (4.2±0.4)m/s
  • d) (4.2±0.6)m/s
Q.10
The number of particles crossing per unit area perpendicular to X-axis in unit time is where n1 and n2 are number of particles per unit volume for the value of x1 and x2 respectively. The dimensions of diffusion constant D are
ch-1_que_no-98_img_no1.png
  • a) M0LT2
  • b) M0L2T-4
  • c) M0LT-3
  • d) M0L2T-1
Q.11
When the number 6.03587 is rounded up to the second place of decimals, it becomes
  • a) 6.035
  • b) 6.04
  • c) 6.03
  • d) none of these
Q.12
if velocity(V), acceleration (A) and Force(F) are taken as fundamental quantities instead of mass(M) Length(L) and Time(T) the dimensions of Young'modulus of elasticity would be ( With MLT young modulus = [ML-1T-2]
  • a) FA2V-2
  • b) FA2V-3
  • c) FA2V-4
  • d) FA2V-5
Q.13
Suppose the acceleration due to gravity at a place is 10m/sIts value in cm/(minute)2 is ..
  • a) 36×105
  • b)3.6×105
  • c) 6×104
  • d) 36×104
Q.14
the volume of sphere is 1.76cmthe volume of 25 such spheres taking into accountthe significant figure is
  • a) 0.44×102cm3
  • b) 44.0 cm3
  • c) 44cm3
  • d) 44.00cm3
Q.15
The dimensional formula for permeability 'µ' is given by..
  • a) MLT-2A-2
  • b) M0L-1T
  • c) M0L2T-1A2
  • d) None of the above
Q.16
The dimensions of self inductance are [IIT 1983]
  • a) MLT-2
  • b) ML2T-1A-2
  • c) ML2T-2A-2
  • d) ML2T-2A-1
Q.17
A resistance of 6Ω with tolerance of 10% and another of 4Ω with tolerance of 10% are connected in series. The tolerance of combination is about
  • a) 5%
  • b) 10%
  • c) 12%
  • d) 15%
Q.18
In Q105 question , the tolerance when resistance connected in parallel is
  • a) 10%
  • b) 20%
  • c) 30%
  • d) 40%
Q.19
In vernier callipers N divisions of vernier scale coincide with (N-1) divisions of main scale in which length of division is 1 mm. The least count of the instrument in cm is
  • a) N
  • b) N-1
  • c) 1/10N
  • d) (1/N) -1
Q.20
The dimensions of a rectangular block measured with callipers having least count of 0.01cm are 5mm×10mm×5mm. The maximum percentage error in the measurement of the volume of the block is [ AMU 1995]
  • a) 20%
  • b) 15%
  • c) 10%
  • d) 5%
Q.21
The equation of a wave is given by where ω is an angular velocity and V is the linear velocity. The dimension of k is : (MPPMT1993)
ch-1_que_no-109_img_no1.png
  • a) LT
  • b) T
  • c) T-1
  • d) T2
Q.22
One 'lux' is equal to [CPMT 1993]
  • a) lumen/m2
  • b) lumen /cm2
  • c) candela/m2
  • d) candela/cm2
Q.23
Erg m-1 can be the unit of of measurement of [DPET 1993]
  • a) Force
  • b) Momentum
  • c) Power
  • d) Acceleration
Q.24
The dimensional formula for Entropy is
  • a) MLT-2θ-1
  • b) ML2
  • c) ML2T-2θ-1
  • d) ML-2T-2θ-1
Q.25
The physical quantity that has no dimensions .. [ EAMCET 1995]
  • a) Angular velocity
  • b) Linear momentum
  • c) Angular Momentum
  • d) Strain
Q.26
Electron volt is the unit of .. [MPPMT 1993]
  • a) Charge
  • b) Potential difference
  • c) Momentum
  • d) Energy
Q.27
SI unit of gas constant are .. [ MPPMT 1987]
  • a) Watt K-1mol-1
  • b) Newton K-1mol-1
  • c) Joule K-1mol-1
  • d) Erg K-1mol-1
Q.28
Universal time is based on [SCRA 1989]
  • a) Rotation of earth on its axis
  • b) Earth's orbital motion around the earth
  • c) Vibration of caesium atom
  • d) Oscillation of quartz crystal
Q.29
Which of the following is most accurate measurement?
  • a) 3×10-2 cm
  • b) 0.030cm
  • c) 300×10-4 cm
  • d) 30×10-3
Q.30
Which of the following is not expressed in proper units [MNR 1995]
  • a) Stress / Strain = N/m2
  • b) surface tension = N/m
  • c) Energy = Kg×m /sec
  • d) Pressure = N/m2
0 h : 0 m : 1 s