Current Electricity (NEET Physics): Questions 29 - 33 of 75

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Question number: 29

» Current Electricity » Kirchhoff's Laws

MCQ▾

Question

Kirchhoff’s laws are based on conservation of

  1. Charge
  2. potential
  3. Energy
  4. Mass

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

Question number: 30

» Current Electricity » Metre Bridge

MCQ▾

Question

In Meter Bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

Choices

Choice (4) Response
a.

Index error

b.

Random error

c.

Due to temperature effect

d.

End correction

Question number: 31

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

Question

The voltmeter shown in fig, reads 6V across the 60Ω resistors. Then the resistance of the voltmeter is-

diagram with 60Ω and 50Ω resistors, Voltmeter and battery.

Diagram With 60Ω and 50Ω Resistors, Voltmeter and Battery.

Here volt meter connected across the 60Ω resistor and battery and 50Ω resistor connected in series with it.

Choices

Choice (4) Response
a.

0 Ω

b.

200 Ω

c.

300 Ω

d.

∞ Ω

Question number: 32

» 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: 33

» 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

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