Current Electricity (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics): Questions 17 - 19 of 25

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Question number: 17

» Current Electricity » Series and Parallel Combinations of Resistors

Appeared in Year: 2014

MCQ▾

Question

Consider the circuit shown below where all resistors are of 1kΩ.

Circuit diagram of nine resistors

Circuit Diagram of Nine Resistors

In figure combination of nine resistors are connected between P and Q.

If a current of magnitude 1 mA flows through the resistor marked X, what is the potential difference measured between points P and Q?

Choices

Choice (4) Response

a.

55 V

b.

34 V

c.

21 V

d.

68 V

Question number: 18

» Current Electricity » Electric Current

MCQ▾

Question

A current of 0.3 A flows through a 30 Ω resistor represented by the circuit diagram. The current in the 100 Ω resistor is,

Circuit diagram of combination of four resistors

Circuit Diagram of Combination of Four Resistors

In figure circuit diagram of combination of four resistors is shown. 0.3 A current is passing through 30 (ohm) resistor. Current i is passing through parallel combination of 25 (ohm) and 15 (ohm) resistors.

Choices

Choice (4) Response

a.

1.26 A

b.

1.66 A

c.

0.56 A

d.

0.89 A

Question number: 19

» Current Electricity » Ohm's Law

Appeared in Year: 2015

MCQ▾

Question

A light bulb of resistance R = 16 Ω is attached in series with an infinite resistor network with identical resistances r as shown below. A 10 V battery drives current in the circuit. What should be

A circuit diagram of light bulb and infinite resistor network

A Circuit Diagram of Light Bulb and Infinite Resistor Network

In circuit diagram a light bulb of resistance R = 16 Ω is attached in series with an infinite resistor network with identical resistances r. A 10 V battery drives current in the circuit.

the value of r such that the bulb dissipates about 1 W of power?

Choices

Choice (4) Response

a.

29.4 Ω

b.

3.7 Ω

c.

14.8 Ω

d.

7.4 Ω

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