# Physics and Measurement (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 8

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## Question number: 4

» Physics and Measurement » Dimensions of Physical Quantities

Appeared in Year: 2015

MCQ▾

### Question

The dimension of the area A of a black hole can be written in terms of the universal gravitational constant G, its mass M and the speed of light c as . Here,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 5

» Physics and Measurement » Dimensions of Physical Quantities

Appeared in Year: 2014

MCQ▾

### Question

The dimensions of Stefan-Boltzmann constant σ can be written in terms of Planck’s constant h, Boltzmann constant kB and the speed of light c as. Here –

### Choices

Choice (4) Response

a.

α=3, β = –4 and γ = 2

b.

c.

d.

## Question number: 6

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

MCQ▾

### Question

In an experiment, on the measurement of g, using a simple pendulum, the time period was measured with an accuracy of 0.3 % while the length was measured with an accuracy of 0.4%. What is the percentage accuracy in the value of g thus obtained?

### Choices

Choice (4) Response

a.

1 %

b.

0.9 %

c.

1.2 %

d.

0.7 %

## Question number: 7

» Physics and Measurement » Dimensional Analysis and Its Applications

Appeared in Year: 2016

MCQ▾

### Question

Physical processes are sometimes described visually by lines. Only the following can cross:

### Choices

Choice (4) Response

a.

Rays in geometrical optics

b.

Lines of force in electrostatics

c.

Streamlines in fluid flow

d.

Lines of force in magnetism

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