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Mdcat-past-papers - DUHS - Physics Quiz

Filters: Board: DUHS | Subject: Physics |
1. The ohm's law is applicable if:



2. Which of the following refers to the DC current that does not change its intensity?



3. The SI unit of electric charge:



4. Resistors of 5Ω and 10Ω are connected in parallel. If the potential difference across 5Ω resistor is 20V, then current through 10Ω will be:



5. A conducting wire of resistivity ρ is cut into two equal parts. The resistivity of each part will be:



6. Four cells of emf 3V are connected in series to form a battery. Net emf of the combination is:



7. The electrical energy dissipated as heat in a resistor is:



8. When different resistors are connected across the terminal of a battery:



9. A soft cylindrical conducting wire has resistance R. It is stretched so its length is doubled but its radius remains constant. What is the new resistance?



10. The internal resistance of a battery is:



11. The electric potential across the terminals of a battery is called:



12. When a body moves with uniform velocity then its:



13. A box of mass m = 6 kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece with mass m = 2 kg moves in the same direction with speed v₁ = 8 m/s. The velocity v₂ of the second piece is:



14. The rate of change of linear momentum of a body is equal to:



15. What will be the value of acceleration if a body of mass 0.5 kg is acted upon by a force of 10 N?



16. What is the time rate of change of linear momentum?



17. A helicopter is ascending with zero acceleration. The apparent force 'F' on it is:



18. A bullet is fired horizontally with 20 m/s. In the absence of air friction its horizontal velocity after 2 seconds will be:



19. A body is dropped from certain height and falls freely. Its velocity after 5 seconds will be:



20. A ball is thrown horizontally with 19.6 m/s. After 2 seconds its horizontal velocity component will be: