The Science and Technology Physics Questions and answers, Physics Quiz 2 is based on objective question, which we covered measurement, dimension and different type of physics question answer.
Question 1 : Which pair given below having different dimension?
(A) Torque and Work
(B) Angular momentum, Plank.s constant
(C) Impulse of force & linear momentum
(D) Tension, Surface tension
Question 2 : Force acting on a body is 10N. If the unit of mass and distance become double and unit of time becomes half then magnitude of force in new unit system will be ____ N.
Question 3 : Unit of power 100erg min.1, unit of time is 1 h, unit of force is 60 dyne then unit of lenght is _____ cm.
Question 4 : When 10 N force is act on a particle momentum obtained is 1 SI, frequency of oscillation for a particle is ____ .
(A) 1 Hz
(B) 10 Hz
(C) 100 Hz
(D) 1 KHz
Question 5 : 100 g mass, 10 cm distance, 0.1s time are taken as units in new system. Unit of work = ______ in new system.
(A) 0.01 J
(B) 0.1 J
(C) 1 J
(D) 10 J
Question 6 : Micrometer screw with pitch 0.5 mm and 50 divisions on circular scale is used to measure diameter of a sphere. Then least count of micrometer screw is ______ .
(A) 0.1 cm
(B) 0.01 cm
(C) 0.001 cm
(D) 0.05 cm
Question 7 : Diameter of a wire is measured with micrometer of least count 0.01 mm. Reading of main scale is 0 mm and reading of circular scale are 48 divisions then diameter of a wire is ________ .
(A) 0.48 cm
(B) 0.048 cm
(C) 0.24 cm
(D) 0.0048 cm
Question 8 : Match the physical quantity in column – 1 with SI unit in Column – 2.
(A). 1 (c), 2 (d), 3 (b), 4 (a)
(B). 1 (b), 2 (c), 3 (a), 4 (d)
(C). 1 (d), 2 (b), 3 (c), 4 (a)
(D). 1 (c), 2 (d), 3 (a), 4 (b)
Question 9 : Match the measurement in column – 1 with significant digits in column – 2.
(A). 1 (b), 2 (a), 3 (d), 4 (c)
(B). 1 (d), 2 (c), 3 (b), 4 (a)
(C). 1 (d), 2 (a), 3 (c), 4 (a)
(D). 1 (b), 2 (c), 3 (d), 4 (a)
Assertion – Reason type Question:
Instruction: Read assertion and reason carefully, select proper option from given below
- Both assertion and reason are true and reason explains the assertion
- Both assertion and reason are true but reason does not explain the assertion
- Assertion is true but reason is false
- Assertion is false and reason is true
Question 11 :
Assertion: Light year and wavelength both represent distance.
Reason: Both having dimension of time.
Question 12 :
Assertion: The distance of stars, which are farthar away than 100 light year cannot measured with the method of parallex removal.
Reason: Angle of parallex removal cannot be measured accurately.
Question 13 :
Assertion: Dimension of Surface tension and Surface energy are equal.
Reason: Their SI units are equal.
Question 14 :
Assertion: y = A sin (wt . kx) and (wt . kx) is dimensionless.
Reason: Dimension of k is M°L1T°
Question 15 :
Assertion : In all measurement, last significant digit is more in accurate.
Reason : d = 0.9 m, d = 0.90 m and d = 0.900 m the d = 0.900 m is more accurate.