Current Electricity (KVPY Stream-SA (Class 11) Physics): Questions 20 - 23 of 25

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Question number: 20

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

In the following circuit, the 3 Ω resistor dissipates power Pi. If the resistor is replaced by 7 Ω, the power dissipated in it is Pf, then

 Circuit of combination of three different resistors

Circuit of Combination of Three Different Resistors

In figure circuit diagram of combination of three different resistors is shown.

Choices

Choice (4) Response

a.

Pf>Pi

b.

Pi>Pf

c.

Pi=Pf

d.

Question does not provide sufficient data or is vague

Question number: 21

» Current Electricity » Kirchhoff's Laws

MCQ▾

Question

Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion AB is

A portion of an electric circuit indicated current

A Portion of an Electric Circuit Indicated Current

In figure a portion of an electric circuit indicated direction and magnitude of current.

Choices

Choice (4) Response

a.

1 A from A to B

b.

2A from B to A

c.

3 A from B to A

d.

0A

Question number: 22

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

If the current through a resistor in a circuit increases by 7%, the power dissipated by the resistor –

Choices

Choice (4) Response

a.

Increases approximately by 49%

b.

Increases approximately by 14%

c.

Increases approximately by 7%

d.

Decreases approximately by 7%

Question number: 23

» Current Electricity » Electric Current

MCQ▾

Question

The current in 2Ω resistance in the circuit show below is,

Circuit diagram having combination of four resistors

Circuit Diagram Having Combination of Four Resistors

In figure combination of four resistors. A battery and a capacitor is also connected in the circuit.

Choices

Choice (4) Response

a.

0.33 A

b.

0.45 A

c.

0.5 A

d.

1 A

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