KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 80 - 82 of 268

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Question number: 80

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

Appeared in Year: 2011

MCQ▾

Question

Four students measure the height of a tower. Each student uses a different method and each measures the height many different times. The data for each are plotted below. The measurement with highest precision is,

Choices

Choice (4) Response

a.

Graph of Number of Trials verses Height Choice A

Graph of Number of Trials Verses Height Choice A

in figure graph of number of trials verses height is shown.

b.

 Graph of Number of Trials verses Height Choice B

Graph of Number of Trials Verses Height Choice B

in figure graph of number of trials verses height is shown.

c.

 Graph of Number of Trials verses Height Choice C

Graph of Number of Trials Verses Height Choice C

In figure graph of number of trials verses height is shown.

d.

Graph of Number of Trials verses Height Choice D

Graph of Number of Trials Verses Height Choice D

In figure graph of number of trials verses height is shown.

Question number: 81

» Current Electricity » Wheatstone Bridge

Appeared in Year: 2012

MCQ▾

Question

As shown in the figure below, a cube is formed with ten identical resistors R (thick lines) and two shorting wires (dotted lines) along the arms AC and BD.

A cube form of ten identical resistors

A Cube Form of Ten Identical Resistors

In figure a cube is formed with ten identical resistors R and two shorting wires.

Resistance between point A and B is –

Choices

Choice (4) Response

a.

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c.

d.

Question number: 82

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2013

MCQ▾

Question

In a photocell circuit the stopping potential, V0, is a measure of the maximum kinetic energy of the photoelectrons. The following graph shows experimentally measured values of stopping potential versus frequency ν of incident light.

Graph of stopping potential verses frequency

Graph of Stopping Potential Verses Frequency

In figure graph of stopping potential verses frequency is shown.

The values of Plank’s constant and the work function as determined from the graph are (taking the magnitude of electronic charge to be e = 1.6 × 10– 19 C)

Choices

Choice (4) Response

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c.

d.

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