Accelerate NEET 2020: Current Electricity Class 1 (05.10.2019)

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Question 1

In the circuit shown the cells A and B have negligible resistance. For V₁=12V, R₁=500 and R=100 the galvanometer (G) shows no deflection. The value of V₈ is

• A4V
• B2V
• C12V
• D6V

Question 2

What will be the equivalent current when, an electron of Hydrogen atom moves in circular orbit of radius 2.5 × 10⁻¹¹ m with the speed of 1 × 10⁶ m/s?

• A1.01 × 10⁻³ A
• B2.02 × 10⁻³ A
• C1.01 × 10⁻⁶ A
• D2.02 × 10⁻⁶ A

Question 3

Across a metallic conductor of non-uniform cross-section, a constant potential difference is applied. The quantity which remain constant along the conductor is

• Acurrent density
• Bcurrent
• Cdrift velocity
• Delectric field

Question 4

A robot is operated by 24 V battery. When we connect an ammeter in series with the battery, it reads 30 mA. After the robot is operated for 3.5 hours, the same ammeter is connected in series to same battery and it reads 15 mA. What is the change in voltage of battery?

• A10 V
• B12 V
• C14 V
• D16 V

Question 5

What will be the reading of voltmeter, when it is connected in parallel to a resistor of 22 kΩ and 1500 μA current is flowing through the resistor?

• A8.25 V
• B16.5 V
• C33 V
• D45 V

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