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Physics · Question 441
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 442
Formula for Power is
P=IV
P=V/I
p=V+I
p=VQ
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Correct answer: A
P=IV
Physics · Question 443
The apparent change in the frequency of sound caused by the relative motion of either the source of sound or listener or both is called:
Compton effect
Zeeman effect
Stark effect
Doppler effect
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Correct answer: D
Doppler effect
Physics · Question 444
The radiation emitted by warm blooded animals lies in the region of:
Visible
Ultraviolet
Infrared
X-rays
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Correct answer: C
Infrared
Physics · Question 445
The energy of simple harmonic oscillator at a displacement "x" is partly kinetic and partly potential. The total energy of a simple harmonic oscillator remains constant everywhere. Which one of the following option will be correct about the simple harmonic oscillator?
Kinetic energy is maximum at extreme position
Potential energy is maximum at extreme position
Both kinetic and potential energies are minimum at mean position
Potential energy is maximum at mean position
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Correct answer: B
Potential energy is maximum at extreme position
Physics · Question 446
Which of this is constant in isochoric process?
Total heat
Work done
Entropy
Internal energy
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Correct answer: B
Work done
Physics · Question 447
Two resistors, each having resistance R, are connected in series. What is their equivalent resistance?
R/2
2R
R
4R
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Correct answer: B
2R
Resistances connected in series add directly, so R + R = 2R.
Physics · Question 448
A 200 watt bulb operates in a 220V circuit. Find the current.
0.9 Amp
0.6 Amp
2 Amp
3 Amp
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Correct answer: A
0.9 Amp
Physics · Question 449
The equation for kinetic energy is:
KE= 2 ~_
K.E=-mv-¥
K.E =+mv-F
KE=
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Correct answer: B
K.E=-mv-¥
Physics · Question 450
Material that have both metallic and non-metallic characteristic are called