NEET Physics: Questions 477 - 481 of 2098

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Question number: 477

» Current Electricity » Potentiometer

MCQ▾

Question

The emf of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of 2Ω is connected as a shunt with the cell, the balance point is obtained at 100 cm. The internal resistance of the cell is

Choices

Choice (4) Response

a.

0.1 Ω

b.

1 Ω

c.

0.5 Ω

d.

2 Ω

Question number: 478

» Current Electricity » Potentiometer

MCQ▾

Question

A potentiometer consists of a wire of length 4 m and resistance 10 Ω. It is connected to cell of emf 2 V. The potential difference per unit length of the wire will be

Choices

Choice (4) Response

a.

2 V/m

b.

0.5 V/m

c.

10 V/m

d.

5 V/m

Question number: 479

» Current Electricity » Wheatstone Bridge

MCQ▾

Question

In the adjoining network of resistors, each is of resistance r ohm, the equivalent resistance between points A and B is-

Circuit Diagram with five equal resistors

Circuit Diagram With Five Equal Resistors

Figure shows the adjoining network of resistor r ohm.

Choices

Choice (4) Response

a.

r

b.

r2

c.

2r3

d.

5r

Question number: 480

» Current Electricity » Color Code for Resistors

MCQ▾

Question

In the figure a carbon resistor has bands of different colors on its body as mentioned in the figure. The value of the resistance is

Carbon Resistor with four band

Carbon Resistor With Four Band

Carbon resistor has bands of different colors on its body

Choices

Choice (4) Response

a.

3.3 k Ω

b.

2.2 k Ω

c.

5.6 k Ω

d.

9.1 k Ω

Question number: 481

» Current Electricity » Electric Cell and Its Internal Resistance

MCQ▾

Question

A micro-ammeter has a resistance of 100Ω and a full scale range of 50 μA. It can be used as a voltmeter or a higher range ammeter provided a resistance is added to it Pick the correct range and resistance combination

(1) 10V range with 200 k Ω resistance in series.

(2) 50V range with 10 k Ω resistance in series.

(3) 5 mA range with 1 Ω resistance in parallel.

(4) 10 mA range with 1 k Ω resistance in parallel.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3

b.

1 and 2

c.

2 and 4

d.

1 and 3

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