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Alternating Current NAT Level - 1 - Physics MCQ
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10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Alternating Current NAT Level - 1
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Alternating Current NAT Level - 1 - Question 1
In an ac circuit, V and I are given by V = 100 sin 100t volts, I = 100 sin 
The power dissipated (in Watts) in circuit is
The power dissipated (in Watts) in circuit is
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Alternating Current NAT Level - 1 - Question 2
In the circuit shown below, the ac source has voltage V = 20cos(ωt) Volts with ω = 2000 the amplitude of the current (in Amperes) will be nearest to
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Alternating Current NAT Level - 1 - Question 3
The power factor of a good choke coil is nearly.
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Alternating Current NAT Level - 1 - Question 4
A coil of 200Ω resistance and 1.0H inductance to an ac source of frequency 200/ 2π Hz. Phase angle (in degree) between potential and current will be
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Alternating Current NAT Level - 1 - Question 5
When 100V D.C. is applied across solenoid a current of 1.0A flows in it. When 100 V A.C. is applied across the same coil the current drops to 0.5A. If the frequency of the A.C. source is 50Hz, the impedance (in Ω) of the solenoid is.
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Alternating Current NAT Level - 1 - Question 6
In the figure shown, a current of 2A flows in the circuit. The impedance (in Ω) of the circuit is
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Alternating Current NAT Level - 1 - Question 7
In an ac circuit the current is given by i = 0.5sin(314t + 60º)mA. The peak to peak value of current is (in mA).
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Alternating Current NAT Level - 1 - Question 8
A steady dc current of 2.83A is flowing in a resistance wire. The rms value of the current (in Amperes) is :
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Alternating Current NAT Level - 1 - Question 9
In series LCR circuit the voltage across R, L and C are shown in figure. The Voltage (in Volts) of applied source is :
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Alternating Current NAT Level - 1 - Question 10
The power factor of LCR circuit at resonance is
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