Online Physics MCQs Test Set 8

This (Multiple Choice Questions-8) is for the students of higher education like B.Sc. + M.Sc. and various competitive exam. You can check to yourself by participating in this online quiz.There are 25 questions in this quiz and you may click on "Show Answer" button if you don't know answer of any question. Let us start!

1. Current entering and leaving a point in a circuit should be

(A) equal
(B) decreasing
(C) increasing
(D) variable

... Answer is (A)
NA (Not Applicable)

2. Current through each resistor when they are connected in series is

(A) different
(B) same
(C) can be both A and B
(D) decreasing

... Answer is (B)
NA

3. 2nd law of Kirchhoff deals with

(A) current in circuit
(B) voltage in circuit
(C) e.m.f in circuit
(D) both B and C

... Answer is (D)
NA

4. Ammeter should always have a

(A) high resistance
(B) low resistance
(C) low voltage
(D) high voltage

... Answer is (B)
NA

5. Ideal resistance of ammeter is

(A) 1 Ω
(B) 2 Ω
(C) 0 Ω
(D) infinite

... Answer is (C)
NA

6. Normal force acting per unit cross sectional area is called

(A) weight
(B) pressure
(C) volume
(D) friction

... Answer is (B)
NA

7. Extension and applied force are

(A) directly proportional
(B) inversely proportional
(C) are independent of each other
(D) inversely related

... Answer is (A)
NA

8. Fractional increase in original length is called

(A) stress
(B) strain
(C) tensile force
(D) compression

... Answer is (B)
NA

9. If extension in spring is proportional to load applied, then material obeys

(A) law of Newton
(B) gravitational law
(C) law of Charles
(D) law of Hooke

... Answer is (D)
Wein's radiation law holds for smaller wavelength.

10. Unit of strain is

(A) Newton
(B) Joules
(C) Watt
(D) no units

... Answer is (D)
NA

11. Unit of stress is

(A) Newton
(B) Joules
(C) Pascal
(D) Watt

... Answer is (C)
NA

12. Tensile strain is equal to

(A) Force per unit area
(B) Force per unit volume
(C) Extension per unit length
(D) Force per unit length

... Answer is (C)
NA

13. X-rays have

(A) short wavelength
(B) high frequency
(C) both A and B
(D) longest wavelength

... Answer is (C)
NA

14. A sound wave which has frequency higher than the upper limit of human hearing is

(A) infra sonic
(B) ultrasonic
(C) supersonic
(D) megasonic

... Answer is (B)
NA

15. An object travelling with constant velocity has

(A) constant momentum
(B) zero momentum
(C) increasing momentum
(D) decreasing momentum

... Answer is (A)
NA

16. In a perfectly elastic collision, momentum and energy are

(A) not conserved
(B) conserved
(C) becomes zero after collision
(D) equal before collision

... Answer is (B)
NA

17. Mass and velocity are combined to give

(A) angular momentum
(B) equilibrium
(C) acceleration
(D) linear momentum

... Answer is (D)
NA

18. If there is no net force acting on body, then its acceleration is

(A) zero
(B) constan
(C) increasing
(D) decreasing

... Answer is (A)
NA

19. Base unit among following is

(A) Newton
(B) Joule
(C) Candela
(D) Watt

... Answer is (C)
NA

20. Activity is proportional to number of

(A) daughter nuclei
(B) decayed nuclei
(C) undecayed nuclei
(D) father nuclei

... Answer is (C)
NA

21. Time taken by a radioactive substance to decay half is called

(A) time delay
(B) half life
(C) time constant
(D) half period

... Answer is (B)
NA

22. Activity of one decay per second is equal to

(A) 1 Bq
(B) 1 atm
(C) 1 mol
(D) 1 Cd

... Answer is (A)
NA

23. Process by which energy is released in sun is

(A) fission
(B) Haber process
(C) fusion
(D) radioactivity

... Answer is (C)
NA

24. If energy is released from a system, its mass

(A) decreases
(B) increases
(C) constant
(D) zero

... Answer is (A)
NA

25. New nucleus after alpha particle decays, is called

(A) parent nucleus
(B) daughter nucleus
(C) decayed nucleus
(D) undecayed nucleus

... Answer is (B)
NA

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