Electromagnetic Induction & Alternating Currents (NEET Physics): Questions 117 - 121 of 121

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Question number: 117

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

The figure shows variation of R, X L and X C with frequency f in a series LCR circuit. Then for what frequency point, the circuit is inductive?

Graph of R, XL and XC

Graph of R, XL and XC

Figure shows the variation of R, XL and XC with frequency f in a LCR circuit.

Choices

Choice (4) Response
a.

A

b.

B

c.

C

d. All of the above

Question number: 118

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

For a series LCR circuit R = X L = 2X C. The impedance of the circuit and phase difference between V and I respectively will be

Choices

Choice (4) Response
a.

5R,tan1(12)

b.

5XC,tan1(2)

c.

5R2,tan1(12)

d.

5R2,tan1(2)

Question number: 119

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

Appeared in Year: 2016

MCQ▾

Question

A 100Ω resistance and a capacitor is 100Ω reactance are connected in series across a 220V source. When the capacitor is 50% charged, the peak value of the displacement current is –

Choices

Choice (4) Response
a.

2.2A

b.

11A

c.

112A

d.

4.4A

Question number: 120

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 2016

MCQ▾

Question

The potential differences across the resistance, capacitance and inductance are 80V,40V and 100V respectively in an L-C-R circuit. The power factor of this circuit is –

Choices

Choice (4) Response
a.

0.8

b.

1.0

c.

0.4

d.

0.5

Question number: 121

» Electromagnetic Induction & Alternating Currents » Quality Factor

Appeared in Year: 2016

MCQ▾

Question

Which of the following combination should be selected for better tuning of an L-C-R circuit used for communication?

Choices

Choice (4) Response
a.

R=25Ω,L=1.5H,C=45μF

b.

R=20Ω,L=1.5H,C=35μF

c.

R=25Ω,L=2.5H,C=45μF

d.

R=15Ω,L=3.5H,C=30μF

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