CSIR Physical Sciences: Questions 57 - 60 of 401

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Question number: 57

» Electromagnetic Theory » Electromagnetic Waves in Free Space

Appeared in Year: 2014

MCQ▾

Question

A light source is switched on and off at a constant frequency f . An observer moving with a velocity u with respect to the light source will observe the frequency of the switching to be – (June)

Choices

Choice (4) Response

a.

f(1u2c2)

b.

f(1u2c2)12

c.

f(1u2c2)1

d.

f(1u2c2)12

Question number: 58

» Classical Mechanics » Lagrangian and Hamiltonian Formalism and Equations of Motion

Appeared in Year: 2012

MCQ▾

Question

If the Lagrangian of a particle moving in one dimension is given by L=x˙22xV(x), the Hamiltonian is – (June)

Choices

Choice (4) Response

a.

12xp2+V(x)

b.

12x˙2+V(x)

c.

x˙22x+V(x)

d.

p22x+V(x)

Question number: 59

» Electronics and Experimental Methods » Digital Techniques and Applications » Counters

Appeared in Year: 2011

MCQ▾

Question

A counter consists of four flip – flops connected as shown in the figure

A counter consists of four flip - flops

A Counter Consists of Four Flip - Flops

In figure a counter consists of four JK flip – flops is shown.

If the counter is initialized as A0A1A2A3=0110 , the state after the next clock pulse is – (December)

Choices

Choice (4) Response

a.

1100

b.

0001

c.

1000

d.

0011

Question number: 60

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

Appeared in Year: 2014

MCQ▾

Question

The I – V characteristic of the diode in the circuit below is given by,

I={;

Where V is measured in volts and I is measured in amperes.

Circuit diagram consist of diode and resistor

Circuit Diagram Consist of Diode and Resistor

In figure a circuit diagram made up of a diode, battery of 10 V and resistance of 1 K (ohm) is shown.

The current I in circuit is – (December)

Choices

Choice (4) Response

a.

10.0 mA

b.

6.7 mA

c.

9.3 mA

d.

6.2 mA

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