The power is the dot product of ___________ quantities.

Related Mcqs:

1. The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________?

   A. 30°
   B. 45°
   C. 60°
   D. 180°

2. The dot product of force and velocity is__________________?

   A. power
   B. work
   C. impulse
   D. torque

3. Which one of the following physical quantities does not have the dimensions of force per unit area ?

   A. Stress
   B. Strain
   C. Youngs modulus
   D. Pressure

4. The number of categories in which physical quantities are divided is_____________?

   A. 1
   B. 2
   C. 3
   D. 4

5. Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?

   A. 40 W
   B. 90W
   C. 100W
   D. 120W

6. The average power and instantaneous power become equal if work is done at __________________?

   A. any rate
   B. at variable rate
   C. at uniform rate
   D. at high rate

7. The dimension of power is_______________?

   A. [ML2T-3]
   B. [ML2T-2]
   C. [ML2T3]
   D. none of these

8. The maximum safe limit dose for persons working in a nuclear power station is ________________?

   A. 1 rem per week
   B. 5 rem per week
   C. 4 rem per week
   D. 3 rem per week

9. A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

   A. λ
   B. Speed of sound
   C. Speed of lightB.
   D. h

10. Errors in the transmission of power through optic fiber can be minimized by using a______________?

    A. Multimode index fiber
    B. Graded index fiber
    C. Single mode step index fiber
    D. Copper wire