Competitive exam important physics questions

1. Rate of change of momentum is called?

A. Force                  B. Pressure                        

C. Velocity              D. Speed             

Answer. A

2. Which Instrument is used to measure depth of ocean?

A. Endoscope         B. Ammeter                       

C. Fathometer         D. Anemometer              

Ans. C

3. AC Voltage in our household circuit ____

A. 135V                       B. 220V                                 

C. 230V                       D. None of the above

Ans. C

4. Rate of change of distance is called?

A. Force                               B. Pressure                         

C. Velocity                           D. Speed

Ans. D

5. Which Instrument is used to measure the power of electric circuit?

A. Volt meter                     B. Barograph                      

C. Watt meter                    D. Wave meter

Ans. C

6. Rate of change of displacement is called?

A. Speed                              B. Work                                      

C. Force                               D. Velocity

Answer. D

7. Which Instrument is used to determine the intensity of colors?

A. Chronometer                  B. Cathetometer             

C. Colorimeter                     D. Commutator

Ans. C

8. The Electric circuit which changes its direction at regular intervals of time is called ___

A. Alternating Current   B. Direct Current              

C. Three phase current  D. All the above

Ans. A

9. What is the value of acceleration of a body moving with constant velocity?

A. One                                  B. Two                                  

C. Three                               D. Zero

Ans. D

10. The EMF of a dry cell is ___

A. Zero Volt                        B. one volt                          

C. 1.5 volt                           D. 2 Volt

11. _____ Instrument is used for measuring sound under water?

A. Hygrometer                  B. Hygroscope                   

C. Hypsometer                 D. Hydrophone

Ans. D

12. What is the unit for electric charge?

A. Ampere                          B. Coulomb                         

C. Newton                          D. Volt

Ans. B

13. What is the unit for Viscosity?

A.Coulomb                                                                                  B. newton second per square meter

C. watt per meter per degree Celsius                                     D. joule per kilogram per kelvin

Ans. B

14. What is the audible frequency range?

A. frequency less than 20 Hz

B. frequency between 20Hz to 20000Hz

C. frequency more than 20000Hz

D. frequency less than 20Hz

Ans. B