GATE (Graduate Aptitude Test in Engineering) Physics (PE): Questions 76 - 79 of 1823

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Question 76

Appeared in Year: 2012

Question MCQ▾

The magnetic field corresponding to the vector potential where is a constant vector, is – (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 77

Appeared in Year: 2014

Question MCQ▾

Consider the amplifier circuit comprising of two

An Amplifier Circuit Composed of Two Op – Amps

If the input ac signal has an impedance of , which of the following statements is true? (December)

Choices

Choice (4)Response

a.

is required in the circuit because the source impedance is much less than R

b.

is required in the circuit because the source impedance is much greater than r

c.

is required in the circuit if the output has to follow the phase of the input signal.

d.

can be eliminated from the circuit without affecting the overall gain

Edit

Question 78

Appeared in Year: 2012

Question MCQ▾

Two events, separated by a (special) distance , are simultaneous in one inertial frame. The time interval between these two events in a frame moving with a constant speed (where the speed of light ) is – (June)

Choices

Choice (4)Response

a.

60 s

b.

0 s

c.

20 s

d.

40 s

Edit

Question 79

Appeared in Year: 2012

Question MCQ▾

Given the usual canonical commutation relation, the commutator of and is - (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit