NEET Physics: Questions 486 - 491 of 2098

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Question number: 486

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

An electric lamp is marked 60 W, 230 V. The cost of a 1 kWh of energy is Rs. 1.25. The cost of using this lamp 8 hr a day for 30 days is (approximately)

Choices

Choice (4) Response

a.

Rs 20

b.

Rs 16

c.

Rs. 10

d.

Rs 18

Question number: 487

» Current Electricity » Resistances of Different Materials

MCQ▾

Question

A voltmeter can measure up to 25 volt and its resistance is 1000 Ω . The resistance required to add with voltmeter to measure up to 250 volt will be

Choices

Choice (4) Response

a.

900 Ω

b.

2500 Ω

c.

1000 Ω

d.

9000 Ω

Passage

In the circuit shown in the figure,

 5Ω resistor and 1Ω internal resistance of battery of 12 V

5Ω Resistor and 1Ω Internal Resistance of Battery of 12 V

In figure 5Ω resistor are connected in series with battery of 12 V having internal resistance 1Ω.

Question number: 488 (1 of 3 Based on Passage) Show Passage

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

Rate of dissipation of electrical energy in battery is

Choices

Choice (4) Response

a.

24 W

b.

20W

c.

4 W

d.

14 W

Question number: 489 (2 of 3 Based on Passage) Show Passage

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

Rate of conversion of chemical energy within the battery is

Choices

Choice (4) Response

a.

4W

b.

20W

c.

14W

d.

24W

Question number: 490 (3 of 3 Based on Passage) Show Passage

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

Rate of dissipation of electrical energy in external resistor is

Choices

Choice (4) Response

a.

24 W

b.

20 W

c.

14 W

d.

4W

Question number: 491

» Current Electricity » Potentiometer

MCQ▾

Question

In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be value of x if the radius of cross-sectional area the wire AB is doubled

Circuit diagram of potentiometer experiment

Circuit Diagram of Potentiometer Experiment

Here figure shows the arrangement of potentiometer experiment. AC is the balancing length of potentiometer wire AB.

Choices

Choice (4) Response

a.

x

b.

Ax

c.

2x

d.

x4

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