CSIR Physical Sciences: Questions 371 - 374 of 401

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Passage

A resistance is measured by passing current through it and measuring the resulting voltage drop. If the voltmeter and the ammeter have uncertainties of 3% and 4% , respectively, then – (June)

Question number: 371 (2 of 2 Based on Passage) Show Passage

» Mathematical Methods of Physics » Dimensional Analysis

Appeared in Year: 2011

MCQ▾

Question

The uncertainty in the value of resistance is:

Choices

Choice (4) Response

a.

5.0%

b.

12.0%

c.

3.5%

d.

7.0%

Question number: 372

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The ground state of Pb nucleus has spin – parity jP=12 , while the first excited state has JP=52 . The electromagnetic radiations emitted when the nucleus makes a transition from the first excited state to the ground state are, (June)

Choices

Choice (4) Response

a.

E2andE3

b.

M2andM3

c.

E2andM3

d.

M2andE3

Question number: 373

» Thermodynamic and Statistical Physics » Thermodynamic Potentials

Appeared in Year: 2011

MCQ▾

Question

A heater and a thermocouple are used to measure and control temperature T of a sample at T0=2500C . A feedback circuit supplies power ‘P’ to the heater according to the equation P=P0+G(T0T)DdTdt with approximately tuned values of coefficients G and D. In order to maintain temperature stability in the presence of an external heat perturbation which causes small but rapid fluctuation of temperature, it is necessary to, (December)

Choices

Choice (4) Response

a.

Decrease G

b.

Increase G

c.

Increases D

d.

Decrease D

Passage

A beam of pions (π+) is incident on a proton target, giving rise to the process

π+pn+π++π+ (June)

Question number: 374 (1 of 2 Based on Passage) Show Passage

» Nuclear and Particle Physics » Elementary Particles and Quantum Numbers » Isospin

Appeared in Year: 2011

MCQ▾

Question

Using Isospin symmetry, the cross – section for the above process can be related to that of the process –

Choices

Choice (4) Response

a.

π+npπ+π

b.

πnpππ

c.

π+p¯nπ+π

d.

πp¯n¯ππ

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