1
KCET 2020
MCQ (Single Correct Answer)
+1
-0

A potentiometer has a uniform wire of length $$5 \mathrm{~m}$$. A battery of emf $$10 \mathrm{~V}$$ and negligible internal resistance is connected between its ends. A secondary cell connected to the circuit gives balancing length at $$200 \mathrm{~cm}$$. The emf of the secondary cell is

A
4V
B
6V
C
2V
D
8V
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0

The colour code for a carbon resistor of resistance $$0.2 \mathrm{k} \Omega \pm 10 \%$$ is

A
red, grey, brown, silver
B
red, green, brown, silver
C
red, grey, silver, silver
D
red, green, silver
3
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Each resistance in the given cubical network has resistance of $$1 \Omega$$ and equivalent resistance between $$A$$ and $$B$$ is

KCET 2020 Physics - Current Electricity Question 9 English

A
$$\frac{5}{6} \Omega$$
B
$$\frac{6}{5} \Omega$$
C
$$\frac{5}{12} \Omega$$
D
$$\frac{12}{5} \Omega$$
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

$$I-V$$ characteristic of a copper wire of length $$L$$ and area of cross-section $$A$$ is shown in figure. The slope of the curve becomes

KCET 2020 Physics - Current Electricity Question 8 English

A
More if experiment is performed at higher temperature
B
More if a wire of steel of same dimension is used
C
Less if the area of the wire is increased
D
Less if the length of the wire is increased
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