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

The resistance of a wire at room temperature $$20^{\circ} \mathrm{C}$$ is found to be $$10 \Omega$$. If resistance of the wire increases by $$10 \%$$, then the temperature of the wire will be (The temperature coefficient of the material of the wire is $$0.002 /{ }^{\circ} \mathrm{C}$$)

A
$$52^0 \mathrm{C}$$
B
$$22^0 \mathrm{C}$$
C
$$62^0 \mathrm{C}$$
D
$$72^0 \mathrm{C}$$
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The potential difference between the points $$\mathrm{P}$$ and $$\mathrm{Q}$$ of the arrangement shown in figure is

COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 21 English

A
$$-9.3$$ V
B
42 V
C
$$-42$$ V
D
$$-3.9$$ V
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An electron starting from rest and moving with the velocity $$\mathrm{v}$$ through a potential difference $$\mathrm{V}$$ is shown by the graphs below. Identify the correct graph.

A
COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 23 English Option 1
B
COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 23 English Option 2
C
COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 23 English Option 3
D
COMEDK 2024 Afternoon Shift Physics - Current Electricity Question 23 English Option 4
4
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
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