Q.1.
Which of the following represents dimensional co-efficient of viscosity?
-
18%
a) M1L2T-2
-
25%
b) M1L1T-1
-
25%
c) M1L2T-1
-
32%
d) M1L-1T-1
Q.2.
Which one of following is not the vector quantity?
-
14%
a) torque
-
12%
b) displacement
-
8%
c) velocity
-
66%
d) speed
Q.3.
Dimension of torque are [AFMC 1997]
-
7%
a) [ M2 L2 T2 ]
-
66%
b) [ M L2 T-2 ]
-
19%
c) [ M L2 T-1 ]
-
8%
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]
-
12%
a) 400%
-
33%
b) 300%
-
27%
c) 100%
-
29%
d) 200%
Explanation
Q.5.
Dimensions of impulse are
-
19%
a) [ M L-2 T-3 ]
-
16%
b) [ ML-2 ]
-
53%
c) [ M L T-1 ]
-
12%
d) [MLT-2]
Q.6.
The dimension of gravitational constant G is
-
12%
a) [ML-2T-3]
-
14%
b) [ML-2]
-
12%
c) [ML-2T2]
-
61%
d) [M-1L3T-2]
Q.7.
The number of significant figures in 3400 is [AFMC 2000]
-
2%
a) 7
-
7%
b) 6
-
7%
c) 12
-
84%
d) 2
Q.8.
Weber/m2 is equal to
-
17%
a) dyne
-
54%
b) tesla
-
10%
c) watt
-
19%
d) henry
Q.9.
The dimensions of Planck's constant are
-
19%
a) [ML-3T-2]
-
26%
b) [ML-2T-1]
-
17%
c) [ML2T-3]
-
38%
d)[ML2T-1]
Q.10.
Chronometer measures [AFMC 2003]
-
24%
a) area
-
29%
b) time
-
25%
c) length
-
22%
d) temperature
Q.11.
Which is not a unit of time? [AFMC 2003]
-
31%
a) leap year
-
12%
b) year
-
7%
c) second
-
50%
d) light year
Q.12.
Which one is a vector quantity? [AFMC 2003]
-
9%
a) Time
-
11%
b) temperature
-
24%
c) flux density
-
56%
d) magnetic field intensity
Q.13.
Light year is unit of [AFMC 2005]
-
10%
a) time
-
14%
b) speed
-
64%
c) distance
-
12%
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]
-
11%
a) 1%
-
30%
b) 1/3%
-
53%
c) 3%
-
5%
d) 10%
Q.15.
Minimum number of unequal vectors which can give zero resultant are [ AFMC 2005]
-
25%
a) 2
-
34%
b) 3
-
19%
c) 4
-
22%
d) more than four
Q.16.
"Pascal second" has the dimensions of [AFMC 2005]
-
6%
a) force
-
18%
b) energy
-
36%
c) pressure
-
40%
d) coefficient of viscosity
Q.17.
magnetic moment has dimensions of [AFMC 2006]
-
12%
a) [LA]
-
35%
b) [L2A]
-
33%
c) [LT-1A]
-
21%
d) [L2TL-1A]
Explanation
Q.18.
What are the dimensions of permeability
-
10%
a) [M1 L1 T1 A-2 ]
-
51%
b) [M1 L1 T-2 A-2 ]
-
28%
c) [M2 L2 T1 A0 ]
-
11%
d) [M1 L2 T2 A-2 ]
Explanation
Q.19.
Which of the following are not the units of self inductance? [AFMC 2010]
-
27%
a) Weber/Ampere
-
29%
b) Ohm-Second
-
27%
c) Joule-Ampere
-
18%
d) Joule-Ampere-2
Q.20.
The dimensional formula for magnetic flux is [AFMC 2010]
-
20%
a) [M1 L2 T-1 C-1]
-
37%
b) [M1 L2 T-2 C-1]
-
24%
c) [M1 L2 T-2 C-1]
-
20%
d) [M1 L2 T-2 C-3]
Explanation
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]
-
26%
a) 6
-
49%
b) 9
-
18%
c) 8
-
6%
d) 10
Explanation
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...
-
16%
a) 4
-
29%
b) 2
-
31%
c) 1
-
24%
d) 6.8
Explanation
Q.23.
The displacement of particle moving along x-axis with respect to time is x = at +bt2 - ctThe dimensions of c are
-
14%
a) T-3
-
48%
b) LT-1
-
26%
c) LT-3
-
12%
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]
-
58%
a) 9.378 m2
-
15%
b) 9.37 m2
-
22%
c) 9.378248 m2
-
5%
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 ..
-
16%
a) 10%
-
20%
b) 30%
-
44%
c) 20%
-
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]
-
14%
a) [ M-1LT-2A]
-
41%
b) [ ML-2 T-2A-1]
-
33%
c) [MLT-2A-2]
-
12%
d) [ MLT-1A-1]
Explanation
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]
-
21%
a)G1/2h1/2c-5/2
-
32%
b) G-1/2h1/2c1/2
-
36%
c) G1/2h1/2c-3/2
-
11%
d) G1/2h1/2c1/2
Q.28.
Which of the following physical quantities do not have same dimensions? .. [ AIIMS 2007]
-
14%
a) pressure and stress
-
52%
b) tension and surface tension
-
32%
c) strain and angle
-
3%
d) energy and work
Q.29.
Which of the following pair of quantities do not have the same dimensions.. [ AFMC 2011]
-
16%
a) potential gradient, electric field
-
28%
b) Torque, kinetic energy
-
48%
c) light year, time period
-
8%
d) Impedance, resistance
Q.30.
"Parsec" is the unit of ... [ AIIMS 2005]
-
21%
a) time
-
43%
b) distance
-
12%
c) frequency
-
24%
d) angular acceleration