Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 43

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In the given figure, there is a circuit of potentiometer of length $A B = 10 m$ . The resistance per unit length is $0.1 Ω$ per $cm$ . Across $A B$ , a battery of emf $E$ and internal resistance $r$ is connected. The maximum value of emf measured by this potentiometer is:

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Important Questions on Current Electricity

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 44

In a potentiometer of

10

wires, the balance point is obtained on the

6^{th}

wire. To shift the balance point to

8^{th}

wire, we should

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 45

The current

i

in the network is

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 46

The value of current $I$ as shown in the given circuit diagram is

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 47

In the circuit given below, the value of resistance

X

, when the potential difference between the points

B

and

D

is zero, will be
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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 48

In the following network, the current flowing through

15 Ω

resistance is

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 49

A resistance of

2 Ω

is connected across one gap of a metre-bridge (the length of the wire is

100 cm

) and an unknown resistance, greater than

2 Ω

, is connected across the other gap. When these resistances are interchanged, the balance point shifts by

20 cm

. Neglecting any corrections, the unknown resistance is

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 50

The colour code for a resistance of

22 Ω \pm 5 %

is _____

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Physics Crash Course NEET>Chapter 13 - Current Electricity>Level 2>Q 51

A carbon resistor of

(47 \pm 4.7) kΩ

to be marked with rings of different colours for its identification. The colour code sequence will be