Q.1
Assertion: The quantity is dimensionally equal to velocity and numerically equal to velocity of light Reason: µ0 is permeability of vacuum and ε0 is the permittivity of vacuum
ch-1_que_no-212_img_no1.png
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.2
Assertion:In any mathematical relation between physical quantities the dimensions on both sides must be the same. Reason: The dimensions of a Physical quantities are the power raised on fundamental quantities to obtained derived physical quantity
ch-1_que_no-213_img_no1.png
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.3
Assertion: Surface energy stands for energy and not for energy per unit area Reason: Dimensions of surface energy are M-1L0T-2
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.4
The observations of the oscillations of a simple pendulum are 2.63s, 2.56s, 2.42s, 2.71s and 2.80s. Clculate average absolute error
  • a) 0.1 s
  • b) 0.11s
  • c) 0.01 s
  • d) 1.0s
Q.5
Assertion: Parallex method cannot be used for measuring distance of stars more than 100light years away Reason: Because parallel angle reduces so much that it cannot be measured accurately
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.6
The surface area and volume of cube is same then volume is ... ...
  • a) 216 unit
  • b) 1000 unit
  • c) 2000 unit
  • d) 3000 unit
Q.7
From two different unit systems, measurement of one physical quantity are n1 and n2 and their units are u1 and u2 respectively. Find the relation between them?
  • a) n1u1 = n2u2
  • b) n1u1 = n2u2 =0
  • c) n1u2 = n2u1
  • d) n1+u1 = n2 +u2
Q.8
If pressure (P), velocity (V) and time (T) are taken as fundamental unit, then what is the dimension of force in new unit system ....
  • a) PV2T2
  • b) P-1V3T-2
  • c) PVT2
  • d) P-1VT2
Q.9
M1L-1T-2 represent which physical quantity ...
  • a) stress
  • b) Young's Modulus
  • c) Pressure
  • d) All of the above
Q.10
What is the dimension for k, in the following equation of wave v = velocity, ω = angular velocity
  • a) LT
  • b) T
  • c) T-1
  • d) T2
Q.11
Which of the following is dimensionally correct?
ch-1_que_no-223_img_no1.png
  • a) Pressure = energy per unit area
  • b) Pressure = energy per unit time
  • c) Pressure = energy per unit volume
  • d) Pressure = momentum per unit time and unit volume
Q.12
Subtracting 0.2J from 7.26J result in significant figure is ... ..
  • a) 7.1J
  • b) 7.06 J
  • c) 7.0 J
  • d) 7 J
Q.13
Dimensional equation of Plank's constant is similar to that of which physical quantity?
  • a) energy
  • b) momentum
  • c) work
  • d) angular momentum
Q.14
In equation, force = X/density. the dimensional formula of physical quantity X is ... ..
  • a) M1L4T-2
  • b) M2L-2T-1
  • c) M2L-2T-2
  • d) M1L-2T-1
Q.15
If Radiation incident on unit surface area per unit time is Q,P=pressure, C = speed of light and quantity denoted by PxQyCx is dimensionless then the value of x, y and z in is ... .
  • a) x = 1, y = 1, z = -1
  • b) x = 1, y = -1, z = 1
  • c) x=-1, y = 1, z = 1
  • d) x=1, y = 1, z = 1
Q.16
If 1 g cm s-1 = x Ns then x = ...
  • a) 9.8
  • b) 6 × 104
  • c) 0.1
  • d) 10-5
Q.17
Which of the following physical of quantities have same dimensional formula ?
  • a) Torque and power
  • b) Force and torque
  • c) Torque and enegy
  • d) Force and power
Q.18
Match the following
1) Electric Potential V a) VA-1 m) M-1L-2T4A2
2) Capacitance C b) JC-1 n) M1L2T-3A-2
Resistance; c) CV-1 p) M1L2T-3A-1
  • a) 1 -a,b ; 2 -b m; 3 -c,p
  • b) 1 -b,m ; 2 -c, p; 3 -a,n
  • c) 1 -b,p ; 2 -c, m; 3 -a,n
  • d) 1 -a,m ; 2 -b, n; 3 -c,p
Q.19
The length, breadth and thickness of metal sheet are 3.241 m, 1.005m and 2.25 cm respectively. The total area and volume of the sheet to the correct number of significant figure are ... m2 and ... m3
  • a) 6.69, 0.073
  • b) 3.345, 0.037
  • c) 8.72, 0.086
  • d) 6.489, 7.93
Q.20
In the following formula the percentage of error in the measurement of a, b, c and d are 2%, 1%, 6% and 4% respectively. the percentage error in W is ... ..
  • a) 14%
    ch-1_qn-233choice_img_no1.png
  • b) 21%
    ch-1_qn-233choice_img_no2.png
  • c) 16%
    ch-1_qn-233choice_img_no3.png
  • d) 15%
    ch-1_qn-233choice_img_no4.png
Q.21
Write dimensional formula for electromotive force (emf)
ch-1_que_no-234_img_no1.png
  • a) M1L-1T-2Q-2
  • b) M1L2T-2Q-2
  • c) M1L0T-2Q-2
  • d) M1L2T-2Q-1
Q.22
The Sun's angular diameter is measured to be 1920". if the distance of the earth from sun is 1.896×1011m then the diameter of the sun is ... (1"=4.85×10-6 rad)
  • a) 1.766 ×109 m
  • b) 1.766 ×1011 m
  • c) 1.393 ×109 m
  • d) 1.496 ×1011 m
Q.23
The length, breadth and thickness of a metal sheet are 4.234m, 1.005 m and 2.01cm respectively. Calculate the total area and volume of the sheet to the correct number of significant figures.
  • a) 8.72 m2, 0.086 m3
  • b) 87.2 m2, 0.086 m3
  • c) 8.72 m2, 0.86 m3
  • d) 0.872 m2, 0.086 m3
Q.24
1 g = ... amu
  • a) 6.024 × 10-29
  • b) 1.66 ×10-30
  • c) 6.024 ×1023
  • d) 1.66 ×10-24
Q.25
If Z = A4, then the relative error introduced in Z is ..
  • a)
  • b)
  • c)
  • d)
Q.26
The position of particle at any time t is given by following equation. Here v0 is constant and a > o, then the dimensions of v0 and a are
  • a) M0L1T-1 and T-1
    ch-1_qn-239choice_img_no1.png
  • b) M0L1T-1 and L1T-2
    ch-1_qn-239choice_img_no2.png
  • c) M0L1T0 and T-1
    ch-1_qn-239choice_img_no3.png
  • d) M0L1T-1 and T-1
    ch-1_qn-239choice_img_no4.png
Q.27
When the electric current of ( 5 ± 0.5)A flows through the wire. Potential difference developed across it is (40 ± 1) V. Then the resistance of the wire is ....
ch-1_que_no-240_img_no1.png
  • a) (8 ± 1) Ω
  • b) (8 ± 0.5) Ω
  • c) (8 ± 2) Ω
  • d) ( 8 ± 1.5) Ω
Q.28
If the units of a, α and β in following equations are m, s-1 and (ms-1)-1 then units of b γ are...
  • a) m2 and (ms-2)-1
  • b) m2 and ms-2
  • c) m and (ms-2)-1
  • d) m and ms-2
Q.29
1 fm = ... ..nm
ch-1_que_no-242_img_no1.png
  • a) 10-9
  • b) 10-6
  • c) 10+6
  • d) 10-3
Q.30
The dimensional formula for the energy passing through unit area, at any point, per unit time will be .. ...
  • a) M1L1T-3
  • b) M1L0T-3
  • c) M1L0T-1
  • d) M1L2T-2
0 h : 0 m : 1 s