Current Electricity-Electrical Energy and Power (KVPY Stream-SA (Class 11) Physics): Questions 1 - 4 of 9

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Question number: 1

» Current Electricity » Electrical Energy and Power

Appeared in Year: 2010

MCQ▾

Question

An electric heater consists of a micro coil and runs under 220 V, consuming 1 kW power. Part of its coil burned out and it was reconnected after cutting off the burn portion. The power it will consume now is:

Choices

Choice (4) Response

a.

1 kW

b.

more than 1 kW

c.

less than 1 kW, but not zero

d.

0 kW

Question number: 2

» Current Electricity » Electrical Energy and Power

Appeared in Year: 2011

MCQ▾

Question

In the following circuit, the 1 Ω resistor dissipates power P. If the resistor is replaced by 9 Ω, the power dissipated in it is

Circuit diagram of two resistors and a battery (Circuit 1)

Circuit Diagram of Two Resistors and a Battery (Circuit 1)

Figure shows two resistors and battery connected in series.

Choices

Choice (4) Response

a.

3P

b.

9P

c.

P3

d.

P

Question number: 3

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

If the current through a resistor in a circuit increases by 4.5%, the power dissipated by the resistor,

Choices

Choice (4) Response

a.

Increases approximately by 4.5%

b.

Increases approximately by 9%

c.

Increases approximately by 0.66%

d.

Decreases approximately by 9%

Question number: 4

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

Following figures show different combinations of identical resistor (s) of resistance R connected to identical battery (ies) of voltage V. Which option is correct regarding the total power dissipated in the circuit?

diagrams of identical resistor(s) and battery(ies) (Circuit M)

Diagrams of Identical Resistor (S) and Battery (Ies) (Circuit M)

In figure circuit of different combination of identical resistor (s) of resistance R and identical battery (ies) of voltage V is down.

Diagrams of identical resistor(s) and battery(ies) (Circuit N)

Diagrams of Identical Resistor (S) and Battery (Ies) (Circuit N)

In figure circuit of different combination of identical resistor (s) of resistance R and identical battery (ies) of voltage V is down.

Diagrams of identical resistor(s) and battery(ies) (Circuit O)

Diagrams of Identical Resistor (S) and Battery (Ies) (Circuit O)

In figure circuit of different combination of identical resistor (s) of resistance R and identical battery (ies) of voltage V is down.

Choices

Choice (4) Response

a.

PM=PN>PO

b.

PN=PO<PM

c.

PN<PM<PO

d.

PM<PN<PO

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