PHY101 FinalTerm Most Important Repeated Mcqs Online Quiz

PHY101 quiz helps us to increase our knowledge

1 / 16

According to the
theory of relativity:

moving clocks run fast

numerically

energy is not conserved in high speed collisions

none of the above are true

2 / 16

The wavelength of
red light is 700 nm. Its frequency is ____________________.

4.30 * 10power5 Hertz

4.30 * 10power4 Hertz

4.30 * 10power3 Hertz

none

3 / 16

A farad is the same
as a

J/V

V/J

C/V

V/C

4 / 16

Mercury is a convenient
liquid to use in a barometer because:

it has a high density

it is a metal

it has a high boiling point

it expands little with temperature

5 / 16

A net torque applied to a
rigid object always tends to produce:

rotational equilibrium

linear acceleration

angular acceleration

rotational inertia

6 / 16

A flat iron is marked “120 V, 600W”. In normal use, the current in it is:

2 A

4 A

5 A

7.2 A

7 / 16

A student kept her 60-watt, 120-volt study lamp turned on from 2:00 PM until 2:00 AM. How
many coulombs of charge went through it?

150

3, 600

7, 200

21, 600

8 / 16

For a cylindrical resistor made of ohmic material, the resistance does NOT depend on:

the current

the length

the cross-sectional area

the resistivity

9 / 16

For an ohmic substance the resistivity is the proportionality constant for:

current and potential difference

current and electric field

current density and potential difference

current density and electric field

10 / 16

A cylindrical copper rod has resistance R. It is reformed to twice its original length with no
change of volume. Its new resistance is:

R

2R

4R

8R

11 / 16

A 60-watt light bulb carries a current of 0.5 A. The total charge passing through it in one hour
is:

120 C

3600 C

3000 C

1800 C

12 / 16

Energy may be measured in:

kilowatt

joule·second

watt

watt·second

13 / 16

The units of resistivity are:

ohm

ohm·meter

ohm/meter

none of these

14 / 16

Current has units:

kilowatt·hour

ampere

coulomb

volt

15 / 16

Current has units:

kilowatt·hour

coulomb/second

coulomb

volt

16 / 16

A car battery is rated at 80 A · h. An ampere-hour is a unit of:

power

energy

current

charge

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