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. |
Question 77
Appeared in Year: 2014
Question MCQ▾
Consider the amplifier circuit comprising of two
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 |
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 |
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. |