1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A wire of uniform cross section and resistance 4 ohms is bent in the shape of square ABCD. Point A is connected to a point $$\mathrm{P}$$ on DC by a wire AP of resistance $$1 \mathrm{ohm}$$. When a potential difference is applied between $$\mathrm{A}$$ and $$\mathrm{C}$$, the points $$\mathrm{B}$$ and $$\mathrm{P}$$ are seen to be in same potential. What is the resistance of part $$\mathrm{DP}$$ ?

COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 6 English

A
$$ \sqrt{2}-1 $$ Ohm
B
2 Ohm
C
1 Ohm
D
Zero Ohm
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The percentage increase in magnetic field $$\mathrm{B}$$ when the space within a current carrying solenoid is filled with a medium of susceptibility 0.004 is

A
0.04
B
4
C
40
D
0.4
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A storage battery of emf $$28.0 \mathrm{~V}$$ and internal resistance $$0.5 \Omega$$ is being charged by a $$140 \mathrm{~V}$$ dc supply using a series resistor of $$27.5 \Omega$$. The terminal voltage of the battery during charging is

A
26V
B
2V
C
5V
D
30V
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A metallic rod of length '$$a$$' is rotated with an angular frequency of $$0.2 \mathrm{~rads}^{-1}$$ about an axis normal to the rod passing through its one end. A constant and uniform magnetic field of '$$\mathrm{B}$$' T parallel to the axis exists everywhere. The emf developed across the ends of the rod is

A
$$\frac{\mathrm{Ba}^2}{10}$$
B
$$\frac{\mathrm{Ba}^2}{5}$$
C
$$\frac{\mathrm{Ba}^2}{50}$$
D
$$\frac{\mathrm{Ba}^2}{2}$$
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