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Current Electricity NAT Level - 1 - Physics MCQ

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10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Current Electricity NAT Level - 1

Current Electricity NAT Level - 1 for Physics 2024 is part of Topic wise Tests for IIT JAM Physics preparation. The Current Electricity NAT Level - 1 questions and answers have been prepared according to the Physics exam syllabus.The Current Electricity NAT Level - 1 MCQs are made for Physics 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Current Electricity NAT Level - 1 below.

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*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 1

The potential difference (in Volts) between point A and B is :

Detailed Solution for Current Electricity NAT Level - 1 - Question 1

The correct answer is: 0.667

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 2

The total power dissipated (in Watts) in the circuit shown here is :

Detailed Solution for Current Electricity NAT Level - 1 - Question 2

The resistances of 6Ω and 3Ω are in parallel in the given circuit, their equivalent resistance is

Again R₁ is in series with 4Ω resistance, hence
R = R₁ + 4 = 2 + 4
= 6Ω
Thus, the total power dissipated in the circuit

The correct answer is: 54

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*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 3

In the figure the potential difference across 6Ω resistor is 48V. Then the potential difference (in Volts) between A and B is

Detailed Solution for Current Electricity NAT Level - 1 - Question 3

The correct answer is: 204

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 4

When the resistance of copper wire is 0.1Ω and the radius is 1 mm, then the length of the wire (in meter) is (Specific resistance of copper is 3.14 × 10^–8 Ωm)

Detailed Solution for Current Electricity NAT Level - 1 - Question 4

The correct answer is: 10

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 5

One filament takes 10 minutes to heat a kettle and another takes 15 min. If connected in parallel they combindly take ........... minutes to heat the same kettle.

Detailed Solution for Current Electricity NAT Level - 1 - Question 5

For first filament

For second filament

When placed in parallel

From Eqs(1), (2), (3) we get

The correct answer is: 6

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 6

For what value of unknown resistance X (in Ω), the potential difference between B and D will be zero in the arrangement of figure shown.

Detailed Solution for Current Electricity NAT Level - 1 - Question 6

For balance bridge

The correct answer is: 6

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 7

Three resistance P, Q, R each of 2Ω and an unknown resistance S from for four arms of a Wheatstone’s bridge circuit. When a resistance of 6Ω is connected in parallel to S the bridge get balanced. What is the value of S (in Ω)?

Detailed Solution for Current Electricity NAT Level - 1 - Question 7

The bridge formed with given resistance is a balanced wheat stone’s bridge.

The situation can be depicted as shown in figure.

As resistances S and 6Ω are in parallel their effective resistance is

or 4S = 12
or S = 3Ω
The correct answer is: 3

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 8

For the network of resistance shown in the figure the equivalent resistance of the network between the points A and B is 18 ohm. The value of unknown resistance R(Ω) is :

Detailed Solution for Current Electricity NAT Level - 1 - Question 8

The correct answer is: 16

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 9

In the circuit of figure A₁ and A₂ are ideal ammeters. Then the reading in ammeter A₂ (in Ampere) is :

Detailed Solution for Current Electricity NAT Level - 1 - Question 9

The correct answer is: 3

*Answer can only contain numeric values

Current Electricity NAT Level - 1 - Question 10

The value of current ( in Ampere)in the circuit will be.

Detailed Solution for Current Electricity NAT Level - 1 - Question 10

According to Kirchhoff’s junction rule,

Sum of incoming currents = Sum of out going currents
⇒ 2 + 2 = 1 + 1.3 + I
∴ I = 1.7A
The correct answer is: 1.7

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