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Physics · Question 431
What is the inappropriate statement for step-up transformer?
t increases given AC voltage
It decreases given alternating current
Heat is never produced in step-up transformer
ts input energy is always less than its output energy
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Correct answer: C
Heat is never produced in step-up transformer
Physics · Question 432
Which radiation cannot be generated under electron transitions in different orbits?
Infrared
Ultraviolet
X-rays
Y-rays
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Correct answer: C
X-rays
Physics · Question 433
In Newton's first law of motion which quantity remains constant:
Velocity
Angular displacement
Amplitude
Amount of work
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Correct answer: A
Velocity
Physics · Question 434
Wave nature of light is proved by:
Polarisation
Black body radiation
Compton's effect
Photoelectric effect
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Correct answer: A
Polarisation
Physics · Question 435
The resistance of full wave rectifier is:
Less than the resistance of half wave rectifier
More than the resistance of half wave rectifier
Equal to the resistance of half wave rectifier
Negligible in comparison to the resistance of half wave rectifier
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Correct answer: B
More than the resistance of half wave rectifier
Physics · Question 436
An ideal gas of N molecules are enclosed in a container at a constant pressure p. The graph between volume of gas and its absolute temperature is a straight line. What is the gradient of the graph?
NR ------------- p
N R P
N k ------------ p
N k p
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Correct answer: B
N R P
Physics · Question 437
What is the inappropriate statement for step-up transformer?
t increases given AC voltage
It decreases given alternating current
Heat is never produced in step-up transformer
ts input energy is always less than its output energy
Show AnswerHide Answer
Correct answer: C
Heat is never produced in step-up transformer
Physics · Question 438
Which radiation cannot be generated under electron transitions in different orbits?
Infrared
Ultraviolet
X-rays
Y-rays
Show AnswerHide Answer
Correct answer: C
X-rays
Physics · Question 439
In Newton's first law of motion which quantity remains constant: