# Current Electricity (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 65 - 68 of 77

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## Question number: 65

» Current Electricity » Kirchhoff's Laws

MCQ▾

### Question

In the given circuit the current I 1 is

### Choices

Choice (4) Response

a.

-0.4 A

b.

0.8 A

c.

-0.8 A

d.

0.4 A

## Question number: 66

» Current Electricity » Potentiometer

MCQ▾

### Question

In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 Ω, the balancing length becomes 120 cm. The internal resistance of the cell is

### Choices

Choice (4) Response

a.

1 Ω

b.

4 Ω

c.

2 Ω

d.

0.5 Ω

## Question number: 67

» Current Electricity » Series and Parallel Combinations of Resistors

MCQ▾

### Question

Twelve wires of equal length and same cross-section are connected in the form of a cube. If the resistance of each of the wires is R, then the effective resistance between the two diagonal ends would be

### Choices

Choice (4) Response

a.

2 R

b.

12 R

c.

R

d.

8 R

## Question number: 68

» Current Electricity » Potentiometer

MCQ▾

### Question

A Potentiometer wire of length 1 m is connected in series with 490 Ω resistance and 2V battery. If 0.2mV/cm is the potential gradient, then resistance of the potentiometer wire is

### Choices

Choice (4) Response

a.

6.9 Ω

b.

5.9 Ω

c.

4.9 Ω

d.

7.9 Ω