Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Lenzs law is a consequence of the law of conservation of:

charge
energy
induced emf
induced current

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Which one of the following is not the unit of energy?

joule
newton metre
kilowatt
kilowatt hour

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Electric motor converts electrical energy into

Mechanical energy
Sound energy
Thermal energy
Light energy

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

A fish swimming in water possess mechanical energy.

True
False

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

A particle of mass $m$ is moving in a horizontal circle of radius $r$ with a centripetal force $\vec {F}=\dfrac{-k}{r^{2}}\hat {r}$. The total mechanical energy of the particle is

$\dfrac{-k}{r}$
$\dfrac{3}{2}\dfrac{k}{r}$
$\dfrac{-k}{2r}$
$\dfrac{-3k}{2r}$

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Which does not have the same unit as others

Watt-sec
Kilowatt-hour
$eV$
$J-sec$

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

It requires twenty turns of the stem of a watch to wind the main spring and this stores sufficient energy to keep the watch running for 30.0 hour.If ten turns are given to the stem, it will run for:

20 hr
15 hr
7.5 hr
3.75 hr.

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Which one of the following units measures energy?

Kilo-watt-hour
$(volt)^{2} (\sec)^{-1} (ohm)^{-1}$
$(pascal)(foot)^{2}$
None of the above

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

How much work will be done in bringing a charge of $10$ milli coulombs from infinity to a point at which potential is $12v$.

$1.2J$
$0.12J$
$0 J$
$120 J$

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Multiple choice physics energy : forms and sources concept of energy energy for everything forms of energy

Erg is a unit of:

energy
pressure
force
velocity

Reveal answer Fill a bubble to check yourself

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