Q.1
Which of the following represents dimensional co-efficient of viscosity?
  • a) M1L2T-2
  • b) M1L1T-1
  • c) M1L2T-1
  • d) M1L-1T-1
Q.2
Which one of following is not the vector quantity?
  • a) torque
  • b) displacement
  • c) velocity
  • d) speed
Q.3
Dimension of torque are [AFMC 1997]
  • a) [ M2 L2 T2 ]
  • b) [ M L2 T-2 ]
  • c) [ M L2 T-1 ]
  • d) [ M L2 T-1 ]
Q.4
If the error in the measurement of the momentum of a particle is (+100%). Then the error in the measurement of kinetic energy is [AFMC 1998]
  • a) 400%
  • b) 300%
  • c) 100%
  • d) 200%
Q.5
Dimensions of impulse are
  • a) [ M L-2 T-3 ]
  • b) [ ML-2 ]
  • c) [ M L T-1 ]
  • d) [MLT-2]
Q.6
The dimension of gravitational constant G is
  • a) [ML-2T-3]
  • b) [ML-2]
  • c) [ML-2T2]
  • d) [M-1L3T-2]
Q.7
The number of significant figures in 3400 is [AFMC 2000]
  • a) 7
  • b) 6
  • c) 12
  • d) 2
Q.8
Weber/m2 is equal to
  • a) dyne
  • b) tesla
  • c) watt
  • d) henry
Q.9
The dimensions of Planck's constant are
  • a) [ML-3T-2]
  • b) [ML-2T-1]
  • c) [ML2T-3]
  • d)[ML2T-1]
Q.10
Chronometer measures [AFMC 2003]
  • a) area
  • b) time
  • c) length
  • d) temperature
Q.11
Which is not a unit of time? [AFMC 2003]
  • a) leap year
  • b) year
  • c) second
  • d) light year
Q.12
Which one is a vector quantity? [AFMC 2003]
  • a) Time
  • b) temperature
  • c) flux density
  • d) magnetic field intensity
Q.13
Light year is unit of [AFMC 2005]
  • a) time
  • b) speed
  • c) distance
  • d) none of these
Q.14
If error in measurement of radius of sphere is 1%, what will be the error in measurement of volume? [AFMC 2005]
  • a) 1%
  • b) 1/3%
  • c) 3%
  • d) 10%
Q.15
Minimum number of unequal vectors which can give zero resultant are [ AFMC 2005]
  • a) 2
  • b) 3
  • c) 4
  • d) more than four
Q.16
"Pascal second" has the dimensions of [AFMC 2005]
  • a) force
  • b) energy
  • c) pressure
  • d) coefficient of viscosity
Q.17
magnetic moment has dimensions of [AFMC 2006]
  • a) [LA]
  • b) [L2A]
  • c) [LT-1A]
  • d) [L2TL-1A]
Q.18
What are the dimensions of permeability
  • a) [M1 L1 T1 A-2 ]
  • b) [M1 L1 T-2 A-2 ]
  • c) [M2 L2 T1 A0 ]
  • d) [M1 L2 T2 A-2 ]
Q.19
Which of the following are not the units of self inductance? [AFMC 2010]
  • a) Weber/Ampere
  • b) Ohm-Second
  • c) Joule-Ampere
  • d) Joule-Ampere-2
Q.20
The dimensional formula for magnetic flux is [AFMC 2010]
  • a) [M1 L2 T-1 C-1]
  • b) [M1 L2 T-2 C-1]
  • c) [M1 L2 T-2 C-1]
  • d) [M1 L2 T-2 C-3]
Q.21
The resistance R of a wire is given by the relation Percentage error in the measurement of ρ, l and r is 1%, 2% and 3% respectively. Then the percentage error in the measurement of R is AFMC 2011]
ch-1_que_no-20_img_no1.png
  • a) 6
  • b) 9
  • c) 8
  • d) 10
Q.22
A wire has length l = (6 ± 0.06) cm, radius r = (0.5 ± 0.005)cm and mass m = (0.3 ± 0.003) g Maximum percentage error in density...
  • a) 4
  • b) 2
  • c) 1
  • d) 6.8
Q.23
The displacement of particle moving along x-axis with respect to time is x = at +bt2 - ctThe dimensions of c are
  • a) T-3
  • b) LT-1
  • c) LT-3
  • d) LT-2
Q.24
The length and breadth of a metal sheet are 3.124m and 3.002m respectively. The area of this sheet up to four correct significant figure is ... [ AIIMS 2001]
  • a) 9.378 m2
  • b) 9.37 m2
  • c) 9.378248 m2
  • d) 9.3782 m2
Q.25
If time period of oscillation of a pendulum is measured as 2.5 second using a stop watch with least count 0.5 sec, then the permissible error in the measurement is ..
  • a) 10%
  • b) 30%
  • c) 20%
  • d) 25%
Q.26
Using mass (M), length (L) and time (T) and current (A) as fundamental quantities , the dimensions of permeability are .. [ AIIMS 2003]
  • a) [ M-1LT-2A]
  • b) [ ML-2 T-2A-1]
  • c) [MLT-2A-2]
  • d) [ MLT-1A-1]
Q.27
The speed of light (c), gravitational constant (G) and Plank's constant(h) are taken as fundamental units in a system. The dimensions of time in this new system should be... [ AIIMS 2008]
  • a)G1/2h1/2c-5/2
  • b) G-1/2h1/2c1/2
  • c) G1/2h1/2c-3/2
  • d) G1/2h1/2c1/2
Q.28
Which of the following physical quantities do not have same dimensions? .. [ AIIMS 2007]
  • a) pressure and stress
  • b) tension and surface tension
  • c) strain and angle
  • d) energy and work
Q.29
Which of the following pair of quantities do not have the same dimensions.. [ AFMC 2011]
  • a) potential gradient, electric field
  • b) Torque, kinetic energy
  • c) light year, time period
  • d) Impedance, resistance
Q.30
"Parsec" is the unit of ... [ AIIMS 2005]
  • a) time
  • b) distance
  • c) frequency
  • d) angular acceleration
0 h : 0 m : 1 s