Electromagnetic Induction & Alternating Currents-Power in AC Circuits (NEET Physics): Questions 1 - 4 of 6

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

Assertion-Reason▾

Assertion (Ꭺ)

A capacitor of suitable capacitance can be used in an ac circuit in place of the choke coil.

Reason (Ꭱ)

A capacitor blocks dc and allows ac only.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 2

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

Assertion-Reason▾

Assertion (Ꭺ)

For an electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.

Reason (Ꭱ)

Capacitive reactance decreases with increase in capacitance of capacitor.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

Question number: 3

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

MCQ▾

Question

In an ac circuit, V and I are given by Equation ,

Equation . The average power dissipated in circuit is

Choices

Choice (4) Response

a.

2.5 watt

b.

10 4 watt

c.

10 watt

d.

0.025 watt

Question number: 4

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

MCQ▾

Question

If a current I given by Equation flows in an ac circuit across which an ac potential of Equation has been applied, then the average power consumption P in the circuit will be

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

f Page
Sign In