Electromagnetic Induction & Alternating Currents-Reactance and Impedance (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 14
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Question number: 1
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
A 120 Volt ac source is connected across a pure inductor of inductance 0.70 H. If the frequency of the ac source is 60 Hz, the current passing through the inductor is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 4.55 amp | |
b. | 0.455 amp | |
c. | 3.55 amp | |
d. | 0.355 amp | |
Question number: 2
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
In an L - R circuit, the value of L is henry and the value of R is 30 ohm. If in the circuit, an alternating e. m. f. of 200 volt at 50 cycles per sec is connected, the impedance of the circuit and current will be
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 40.4 Ω, 5A | |
b. | 30.7 Ω, 6.5A | |
c. | 50 Ω, 4A | |
d. | 11.4Ω, 17.5A | |
Question number: 3
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
In the circuit, E = 10 volt, R1 = 5.0 ohm, R 2 = 10 ohm and L = 5.0 henry. The current just after the switch S is pressed is.
A Diagram Consists of Resistors, Inductor, Switch and Battery
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 2.0A | |
b. | 6.0A | |
c. | 5.0A | |
d. | 3.0A | |
Question number: 4
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
An alternating current of frequency is flowing in a circuit containing a resistor of resistance R and a choke of inductance L in series. The impedance of this circuit is
Choices
| Choice (4) | Response | |
|---|---|---|
a. |
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b. |
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c. |
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d. |
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Question number: 5
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
An inductive circuit contains resistance of 10Ω and an inductance of 20 H. If an ac voltage of 120 V and frequency 60 Hz is applied to this circuit, the current would be nearly
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 0.48 A | |
b. | 0.32 A | |
c. | 0.80 A | |
d. | 0.016 A | |