Free Printable Physics for Architecture orientation 03

Worksheets

Physics for Architecture orientation 03

Total questions: 40

Worksheet time: 30mins

Name

Class

Date

All of the following have the same units except:

inductance.

capacitive reactance.

impedance.

resistance.

A resistor is connected to an AC power supply. On this circuit, the current

leads the voltage by 90°.

lags the voltage by 90°.

is in phase with the voltage.

none of the given answers

A pure inductor is connected to an AC power supply. In this circuit, the current

leads the voltage by 90°.

lags the voltage by 90°.

is in phase with the voltage.

none of the given answers.

If the frequency of the AC voltage across an inductor is doubled, the inductive reactance of that inductor

increases to 4 times its original value.

increases to twice its original value.

decreases to one-half its original value.

decreases to one-fourth its original value.

A pure capacitor is connected to an AC power supply. In this circuit, the current

leads the voltage by 90°.

lags the voltage by 90°.

is in phase with the voltage.

none of the given answers

What is the phase angle between the voltages of the inductor and capacitor in a RLC series circuit?

zero

90°

180°

270°

The power factor of an RLC circuit is defined as cos ∅ = R/Z, but the phase angle can also be calculated from ________.

sin ∅ = (XL - XC)/Z

sin ∅ = (XL - XC)/RZ

sin ∅ = Z/(XL - XC)

sin ∅ = RZ/(XL - XC)

Consider an RLC circuit that is driven by an AC applied voltage. At resonance,

the peak voltage across the capacitor is greater than the peak voltage across the inductor.

the peak voltage across the inductor is greater than the peak voltage across the capacitor.

the current is in phase with the driving voltage.

the peak voltage across the resistor is equal to the peak voltage across the inductor.

A capacitor 120 µF is connected to an AC source of 6 V with frequency 100 Hz. If the frequency is increased to 200 Hz, the reactance of the capacitor will be

half the original value.

same as the original value.

two times the original value.

the reciprocal of the original value.

10.

If an electric bulb is connected to an AC source, which of the following statement is true about the phase difference between the voltage across the bulb and current flowing in it?

In phase.

Not in phase.

The voltage is leading the current.

The current is leading the voltage.

11.

Electromagnetic induction is change in ___________________.

surface area

magnetic poles

magnetic flux

12.

Voltage can be induced in a wire by

a. moving the wire near a magnet.

b. moving a magnet near the wire.

c. changing the current in a nearby wire.

d. all of these

13.

What would happen if I move a bar magnet in and out of a coil of copper wire?

Electric current would disappear

The magnet would explode

Electric current will flow through the wire

It would produce a gravitational field

14.

A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage

quadruples

doubles

is the same

halves

15.

A magnet can move in a coil of wire to produce electricity in which system?

Generator

Motor

Magnet

Transformer

16.

___ Law says that the Induced current is proportional to the change of magnetic flux

Lenz'

Faraday's

Ampere's

17.

Which description best applies to Lenz's Law?

An induced current occurs when a magnet passes through a tube.

When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change.

The direction of an induced current is such to align with the change that created it.

A magnet is a tube is always slowed by its magnetic field.

18.

What happens to the galvanometer if the copper rod is moved upwards?

No change

Deflect to the right

Deflect to the left

Deflect to the right and left

19.

Which action will increase the deflection of the galvanometer pointer?

The magnetic pole is reversed

The number of turns of coils is increased

The coil is made from insulated wire

The magnet is slowly pushed into the coil

20.

The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?

Flip the magnet around so the North pole is facing out

Move the magnet back and forth

Take the magnet out

Add more coils around the paper cylinder

21.

We combine two lenses, one is convex and other is concave having focal lengths /, and f2 and their combined focal length is F. Combination of the lenses will behave like concave lens, if

f1 > f2

f1 = f2

f1 < f2.

f1 ≤ f2

22.

The focal length of a biconvex lens of radii of each surface 50 cm and refractive index 1.5, is

40.4 cm

75 cm

50 cm

80 cm

23.

Tom’ lenses of focal lengths ± 15 cm and ± 150 cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be

+ 15 cm

+ 150 cm

– 150 cm

– 15 cm

24.

A convex lens and a concave lens, each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power of the combination (in dioptres) is

zero

infinity

25.

The refractive index of the material of an equilateral prism is √3. What is the angle of minimum deviation?

45°

60°

37°

30°

26.

A convex lens of refractive index 3/2 has a power of 2.5 D in air. If it is placed in a liquid of refractive index 2 then the new power of the lens is

– 1.25 D

– 1.5 D

1.25 D

1.5 D

27.

A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will

become zero

become infinite

become small, but non-zero

remain unchanged

28.

Two beams of red and violet color are made to pass separately through a prism (angle of the prism is 60°). In the position of minimum deviation, the angle of refraction will be

30° for both the colors

greater for the violet color

greater for the red color

equal but not 30° for both the colors

29.

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then

the magnification is 1000

the length of the telescope tube is 20.02 m

the image formed of inverted

all of these

30.

A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the prism is made of a material of refractive index 1.5, the angle of incidence is

7.5°

5°

15°

2.5°

31.

A wavefront is defined as a surface of ________

Variable Phase

Constant Phase

32.

The shape of waverfront for a light emerging out of a convex lens when a point source is placed at its focus

Plane wavefront

Soherical wavefront

33.

The nature of the wavefront for a point source of light is _____

Spherical wanefront

Plane wavefront

34.

The characteristics of wave which does not change after refraction is

Wavelength

Velocity

Frequency

35.

The doppler shift for a sodium light line at 589.0 nm is observed at 589.6 nm. This shows............

Red shift

Blue shift

36.

A star appears to be white according to its spectral composition, but it appears blue when observed through a telescope. What is the best explanation for this phenomenon?

A The object is moving toward Earth.

B The object is moving away from Earth.

C The object is moving parallel to Earth.

D all of the above

37.

The disturbance that travelling through medium or vacuum from one place to other by transferring the energy. That sentence is definition for......

Wave

Vibration

Medium

Oscillation

38.

The intensity of light for the interference of two light wave with a phase difference of $\phi$ is

$I=4I_o\cos\frac{\phi}{2}$

$I=4I_o\cos^2\ \frac{\phi}{2}$

$I=4I_o\cos\phi$

$I=4I_o^2\cos\phi$

39.

Polarization of light is best described by

the bouncing back of light form mirror.

the splitting of white light into seven colours.

restricting component of light in a particular direction.

change of direction of light when it passes form one transparent medium to another.

40.

Brewster law for Polarization of light is

n=\cos⁡i_B

$n=\tan⁡i_B$

$n=\tan^{-1}⁡i_B$

$n=\cos^{-1}⁡i_B$

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Physics for Architecture orientation 03

Total questions: 40

Worksheet time: 30mins

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