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

Two identical moving coil galvanometers have $$10 \Omega$$ resistance and full-scale deflection at $$2 \mu \mathrm{A}$$ current. One of them is converted into a voltmeter of range $$10 \mathrm{~mV}$$ and the other into an ammeter of range $$1 \mathrm{~mA}$$ using appropriate resistors. The ratio of resistance of the converted voltmeter to that of the ammeter is

A
5000 : 1
B
2500 : 1
C
250000 : 1
D
25000 : 1
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The velocity of an electron so that its momentum is equal to that of a photon of wavelength $$660 \mathrm{~nm}$$ is

A
$$ 109.88 \mathrm{~cm} \mathrm{~s}^{-1} $$
B
$$ 1098 \mathrm{~ms} ^{-1} $$
C
$$ 1098 \mathrm{~cm} \mathrm{~s}^{-1} $$
D
$$ 109 \mathrm{~ms} ^{-1} $$
3
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
4
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
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