Physics Interviews Jobs Test MCQs Question Answers |

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### Physics MCQs With Answers For Interviews Jobs Preparations

Q.1: Which one is the dimensionally correct equation ?

- f=vt
- S=Vit+1/2at2
- V=St
- V=f/t

B

Q.2: The rotational K.E of the hoop is equal to the------- ?

- its translational K.E
- half than its translational K.E
- double than its translational K.E
- four times than its translational K.E

A

Q.3: One radian is equal to---------- ?

- 67.3°
- 57.3°
- 87.3°
- 60°

B

Q.4: A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is-------- ?

- Maximum
- Zero
- Equal to the weight of the stone
- Less than the weight of the stone

C

Q.5: Linear momentum of a photon is---------- ?

- zero
- hv/c2
- hv/c
- c2/hv

A

Q.6: The angular speed for daily rotation of the earth in rad S-1 is-------- ?

- 7.3 x 10 radians/second
- 7.3 x 5 radians/second
- 3.7 x 10 7.3 x 5 radians/second
- 7.3 x 10-5 radians/second

D

Q.7: A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be------ ?

- 9.8 N
- 19.6 N
- 129.4 N
- 39.2 N

D

Q.8: Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be------ ?

- Ï€R
- 2Ï€R
- 0
- 4Ï€R

C

Q.9: When the body moves with terminal velocity the acceleration in the body become---------- ?

- 0
- Maximum
- Variable
- Infinite

A

Q.10: According to equation of continuity A1V1 = A2V2 = constant. The constant is equal to--------- ?

- Flow rate
- Volume of fluid
- Mass of fluid
- The density of the fluid

A

Q.11: For which position maximum blood pressure in the body have the smallest value ?

- Standing straight
- Sitting on chair
- Sitting on ground
- Laying horizontally

D

Q.12: Laminar flow usually occurs at speeds------- ?

- Low
- High
- Very high
- Some time high and some time low

A

Q.13: Stokes law is applicable if body has ----------shape ?

- Rough
- Square
- Circular
- Spherical

D

Q.14: For ----------- flow the path of the fluid particles cannot be tracked ?

- Laminar
- Streamline
- Turbulent
- Both A and B

C

Q.15: The time period of a second pendulum is---------- ?

- 4 seconds
- 3 seconds
- 2 seconds
- 6 seconds

C

Q.16: The product of the frequency and time period is equal to--------- ?

- 1
- 2
- 3
- 4

A

Q.17: Electrical resonance is observed in---------- ?

- Radio
- Microwave oven
- Both in radio and microwave oven
- Neither in radio nor in a microwave oven

A

Q.18: A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ?

- 0
- 1
- 2
- 3

B

Q.19: Forced vibration is known as--------- ?

- Simple harmonic vibration
- Natural vibration
- Driven harmonic vibration
- Free vibration

C

Q.20: If a material object moves with speed of light its mass becomes --------- ?

- equal to its rest mass
- double of its rest mass
- infinite
- zero

C