Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

Which quantities are measured in the same unit?

  1. energy, power and work

  2. energy and power, but not work

  3. energy and work, but not power

  4. power and work, but not energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Quantity             Dimension
Energy              $ML^2T^{-2}$
Work                  $ML^2T^{-2}$
Power                 $ML^2T^{-3}$

So, the dimension of energy and work is same but different to power.
Option (C) is correct.
Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

Read the following statements carefully and pick out the correct choice of answer.
A: Electromotive force is expressed in Newtons.
B: Electric intensity is expressed in ${ VC }^{ -1 }$.

  1. Both A and B are correct.

  2. Both A and B are wrong.

  3. A is correct but B is wrong.

  4. A is wrong but B is correct.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electromotive force is the voltage developed by any source of electrical energy such as a battery or dynamo. It is generally defined as the electrical potential for a source in a circuit.

It is not a force but voltage and its unit is volt.

Electric intensity at a point is defined as the force experienced per unit positive charge at a point placed in the electric field. 
Its unit is $Newton/Coloumb=NC^{-1}$

Both statements are wrong.

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

Read the following statements carefully and pick out the correct choice of answer.
A: Susceptibility is expressed as ${ Am }^{ -1 }$.
B: Magnetic flux is expressed ${ JA }^{ -1 }$.

  1. A is correct but B is wrong.

  2. A is wrong but B is correct.

  3. Both A and B are wrong.

  4. Both A and B are correct.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Susceptibility is unit less.
Magnetic flux is expressed $Vs$ or $[M^1L^2T^{-2}A^{-1}] = JA^{-1}$.


Hence, option B is correct.