Accelerate NEET 2020: Current Electricity Class 5 (22.10.2019)

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Question 1

Direction: Each of these questions contains two statements. Assertion and Reason Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.

Assertion (A): The bar magnet falling vertically along the axis of the horizontal coil will be having acceleration less than g.

Reason (R):Clockwise current induced in the coil.

• AIf both Assertion and Reason are true and Reason is correct explanation of Assertion.
• BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
• CIf Assertion is true but Reason is false.
• DIf both Assertion and Reason are false.

Question 2

The mass of the three wires of copper are in the ratio 1 : 3 : 5. And their length are in ratio 5 : 3 : 1. The ratio of their electrical resistance is

• A1 : 3 : 5
• B5 : 3 : 1
• C1 : 15 : 125
• D125 : 15 : 1

Question 3

A battery of emf 10 V is connected to resistances as shown in figure. The potential difference between points A and B is

• A− 2 V
• B2 V
• C5 V
• D

Question 4

6Ω and 12Ω resistors are connected in parallel. This combination is connected in series with a 10 V battery and 6Ω resistor. What is the potential difference between the terminals of the 12Ω resistor?

• A4 V
• B16 V
• C2
• D8 V

Question 5

Charge passing through a conductor of cross section area A = 0.3m² is given by q = 3t² +5t+2 in coulomb, where t is in second. What is the value of drift velocity at t = 2s? (Given, n = 2×10²⁵/m³)

• A0.77×10^-5 m/s
• B1.77×10^-5 m/s
• C2.08×10^-5 m/s
• D0.57×10^-5 m/s

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